/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/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 05:46:59,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 05:46:59,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 05:46:59,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 05:46:59,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 05:46:59,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 05:46:59,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 05:46:59,501 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 05:46:59,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 05:46:59,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 05:46:59,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 05:46:59,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 05:46:59,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 05:46:59,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 05:46:59,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 05:46:59,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 05:46:59,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 05:46:59,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 05:46:59,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 05:46:59,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 05:46:59,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 05:46:59,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 05:46:59,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 05:46:59,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 05:46:59,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 05:46:59,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 05:46:59,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 05:46:59,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 05:46:59,549 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 05:46:59,583 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 05:46:59,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 05:46:59,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 05:46:59,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 05:46:59,589 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 05:46:59,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 05:46:59,589 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 05:46:59,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 05:46:59,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 05:46:59,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 05:46:59,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 05:46:59,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 05:46:59,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 05:46:59,590 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 05:46:59,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 05:46:59,591 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 05:46:59,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 05:46:59,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 05:46:59,593 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 05:46:59,594 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 05:46:59,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 05:46:59,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:46:59,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 05:46:59,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 05:46:59,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 05:46:59,595 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 05:46:59,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 05:46:59,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 05:46:59,596 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 05:46:59,596 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 05:46:59,887 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 05:46:59,908 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 05:46:59,912 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 05:46:59,913 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 05:46:59,913 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 05:46:59,915 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-07-20 05:46:59,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb4a298cf/4e10c2c5db7844e385e23c9c47b6e72d/FLAG94c8f734c [2020-07-20 05:47:00,436 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 05:47:00,436 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-07-20 05:47:00,441 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb4a298cf/4e10c2c5db7844e385e23c9c47b6e72d/FLAG94c8f734c [2020-07-20 05:47:00,819 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb4a298cf/4e10c2c5db7844e385e23c9c47b6e72d [2020-07-20 05:47:00,831 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 05:47:00,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 05:47:00,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 05:47:00,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 05:47:00,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 05:47:00,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:47:00" (1/1) ... [2020-07-20 05:47:00,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@453e8379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:00, skipping insertion in model container [2020-07-20 05:47:00,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:47:00" (1/1) ... [2020-07-20 05:47:00,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 05:47:00,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 05:47:01,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:47:01,076 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 05:47:01,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:47:01,208 INFO L208 MainTranslator]: Completed translation [2020-07-20 05:47:01,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01 WrapperNode [2020-07-20 05:47:01,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 05:47:01,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 05:47:01,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 05:47:01,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 05:47:01,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01" (1/1) ... [2020-07-20 05:47:01,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01" (1/1) ... [2020-07-20 05:47:01,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01" (1/1) ... [2020-07-20 05:47:01,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01" (1/1) ... [2020-07-20 05:47:01,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01" (1/1) ... [2020-07-20 05:47:01,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01" (1/1) ... [2020-07-20 05:47:01,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01" (1/1) ... [2020-07-20 05:47:01,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 05:47:01,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 05:47:01,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 05:47:01,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 05:47:01,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01" (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 05:47:01,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 05:47:01,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 05:47:01,357 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-20 05:47:01,358 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 05:47:01,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 05:47:01,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 05:47:01,359 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 05:47:01,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 05:47:01,359 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 05:47:01,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 05:47:01,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 05:47:01,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 05:47:01,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 05:47:01,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 05:47:01,650 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 05:47:01,651 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 05:47:01,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:47:01 BoogieIcfgContainer [2020-07-20 05:47:01,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 05:47:01,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 05:47:01,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 05:47:01,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 05:47:01,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:47:00" (1/3) ... [2020-07-20 05:47:01,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40720f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:47:01, skipping insertion in model container [2020-07-20 05:47:01,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01" (2/3) ... [2020-07-20 05:47:01,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40720f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:47:01, skipping insertion in model container [2020-07-20 05:47:01,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:47:01" (3/3) ... [2020-07-20 05:47:01,663 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-07-20 05:47:01,676 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 05:47:01,690 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 05:47:01,719 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 05:47:01,758 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 05:47:01,758 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 05:47:01,759 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 05:47:01,759 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 05:47:01,759 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 05:47:01,759 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 05:47:01,759 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 05:47:01,760 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 05:47:01,779 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-20 05:47:01,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 05:47:01,785 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:01,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:01,787 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:01,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:01,794 INFO L82 PathProgramCache]: Analyzing trace with hash 855240046, now seen corresponding path program 1 times [2020-07-20 05:47:01,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:01,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017886131] [2020-07-20 05:47:01,804 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:47:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:01,997 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 05:47:01,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017886131] [2020-07-20 05:47:01,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:47:02,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:47:02,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898135841] [2020-07-20 05:47:02,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:47:02,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:02,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:47:02,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:47:02,019 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-07-20 05:47:02,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:02,144 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-07-20 05:47:02,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:47:02,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 05:47:02,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:02,156 INFO L225 Difference]: With dead ends: 42 [2020-07-20 05:47:02,156 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 05:47:02,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 05:47:02,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 05:47:02,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-20 05:47:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 05:47:02,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-20 05:47:02,191 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-07-20 05:47:02,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:02,192 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-20 05:47:02,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:47:02,192 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-20 05:47:02,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 05:47:02,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:02,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:02,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 05:47:02,194 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:02,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:02,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1631497781, now seen corresponding path program 1 times [2020-07-20 05:47:02,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:02,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001330629] [2020-07-20 05:47:02,196 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:47:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:02,285 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 05:47:02,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001330629] [2020-07-20 05:47:02,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:47:02,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 05:47:02,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965105745] [2020-07-20 05:47:02,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 05:47:02,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:02,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 05:47:02,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 05:47:02,290 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-07-20 05:47:02,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:02,356 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-07-20 05:47:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 05:47:02,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-07-20 05:47:02,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:02,359 INFO L225 Difference]: With dead ends: 34 [2020-07-20 05:47:02,359 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 05:47:02,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 05:47:02,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 05:47:02,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-20 05:47:02,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 05:47:02,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 05:47:02,374 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-07-20 05:47:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:02,374 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 05:47:02,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 05:47:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 05:47:02,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 05:47:02,376 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:02,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:02,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 05:47:02,378 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:02,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:02,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1934775405, now seen corresponding path program 1 times [2020-07-20 05:47:02,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:02,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825991440] [2020-07-20 05:47:02,380 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:47:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:02,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825991440] [2020-07-20 05:47:02,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394721296] [2020-07-20 05:47:02,462 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@cd862f4 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 05:47:02,537 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@cd862f4 issued 3 check-sat command(s) [2020-07-20 05:47:02,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:02,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 05:47:02,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:02,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:02,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-20 05:47:02,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344674577] [2020-07-20 05:47:02,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 05:47:02,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:02,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 05:47:02,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 05:47:02,585 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-07-20 05:47:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:02,644 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-07-20 05:47:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 05:47:02,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-20 05:47:02,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:02,646 INFO L225 Difference]: With dead ends: 36 [2020-07-20 05:47:02,646 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 05:47:02,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 05:47:02,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 05:47:02,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-07-20 05:47:02,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 05:47:02,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-20 05:47:02,653 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-07-20 05:47:02,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:02,654 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-20 05:47:02,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 05:47:02,654 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-20 05:47:02,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 05:47:02,655 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:02,656 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:02,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 05:47:02,871 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:02,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:02,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1739404943, now seen corresponding path program 2 times [2020-07-20 05:47:02,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:02,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417899560] [2020-07-20 05:47:02,874 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:47:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:02,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:02,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417899560] [2020-07-20 05:47:02,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752697825] [2020-07-20 05:47:02,982 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5f9b90f5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:03,062 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5f9b90f5 issued 3 check-sat command(s) [2020-07-20 05:47:03,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:03,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 05:47:03,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:03,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:03,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-20 05:47:03,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500433314] [2020-07-20 05:47:03,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 05:47:03,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:03,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 05:47:03,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 05:47:03,082 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-07-20 05:47:03,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:03,143 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-07-20 05:47:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 05:47:03,144 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-07-20 05:47:03,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:03,144 INFO L225 Difference]: With dead ends: 38 [2020-07-20 05:47:03,145 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 05:47:03,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 05:47:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 05:47:03,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-07-20 05:47:03,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 05:47:03,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-07-20 05:47:03,151 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-07-20 05:47:03,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:03,151 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-07-20 05:47:03,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 05:47:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-07-20 05:47:03,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 05:47:03,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:03,153 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:03,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:03,367 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:03,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:03,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1328015311, now seen corresponding path program 3 times [2020-07-20 05:47:03,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:03,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58056152] [2020-07-20 05:47:03,370 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:47:03,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:03,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58056152] [2020-07-20 05:47:03,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261949037] [2020-07-20 05:47:03,483 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b048401 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 05:47:03,594 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b048401 issued 3 check-sat command(s) [2020-07-20 05:47:03,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:03,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 05:47:03,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:03,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:03,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-20 05:47:03,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409391922] [2020-07-20 05:47:03,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 05:47:03,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:03,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 05:47:03,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-20 05:47:03,630 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-07-20 05:47:03,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:03,704 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-07-20 05:47:03,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 05:47:03,705 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-07-20 05:47:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:03,706 INFO L225 Difference]: With dead ends: 40 [2020-07-20 05:47:03,706 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 05:47:03,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-20 05:47:03,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 05:47:03,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-07-20 05:47:03,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 05:47:03,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 05:47:03,717 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-07-20 05:47:03,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:03,718 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 05:47:03,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 05:47:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 05:47:03,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 05:47:03,722 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:03,722 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:03,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:03,936 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:03,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:03,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1523652947, now seen corresponding path program 4 times [2020-07-20 05:47:03,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:03,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625632790] [2020-07-20 05:47:03,937 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:47:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:04,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625632790] [2020-07-20 05:47:04,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488448817] [2020-07-20 05:47:04,019 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3569da8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:04,127 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3569da8 issued 3 check-sat command(s) [2020-07-20 05:47:04,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:04,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 05:47:04,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:04,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:04,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-07-20 05:47:04,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89024836] [2020-07-20 05:47:04,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 05:47:04,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:04,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 05:47:04,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-20 05:47:04,154 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-07-20 05:47:04,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:04,201 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-07-20 05:47:04,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 05:47:04,202 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 05:47:04,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:04,203 INFO L225 Difference]: With dead ends: 42 [2020-07-20 05:47:04,203 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 05:47:04,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-20 05:47:04,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 05:47:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-07-20 05:47:04,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 05:47:04,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-07-20 05:47:04,209 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-07-20 05:47:04,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:04,210 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-07-20 05:47:04,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 05:47:04,210 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-07-20 05:47:04,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 05:47:04,211 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:04,211 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:04,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:04,425 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:04,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:04,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1787714037, now seen corresponding path program 5 times [2020-07-20 05:47:04,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:04,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322534985] [2020-07-20 05:47:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:47:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:04,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322534985] [2020-07-20 05:47:04,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820119665] [2020-07-20 05:47:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@22e9310c 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 05:47:04,705 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@22e9310c issued 3 check-sat command(s) [2020-07-20 05:47:04,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:04,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 05:47:04,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:04,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:04,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-07-20 05:47:04,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776533701] [2020-07-20 05:47:04,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 05:47:04,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:04,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 05:47:04,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-20 05:47:04,733 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 10 states. [2020-07-20 05:47:04,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:04,824 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-07-20 05:47:04,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 05:47:04,824 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-20 05:47:04,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:04,826 INFO L225 Difference]: With dead ends: 44 [2020-07-20 05:47:04,826 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 05:47:04,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-20 05:47:04,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 05:47:04,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-07-20 05:47:04,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 05:47:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-07-20 05:47:04,832 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-07-20 05:47:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:04,833 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-07-20 05:47:04,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 05:47:04,833 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-07-20 05:47:04,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 05:47:04,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:04,834 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:05,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-20 05:47:05,044 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:05,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:05,044 INFO L82 PathProgramCache]: Analyzing trace with hash 2147351063, now seen corresponding path program 6 times [2020-07-20 05:47:05,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:05,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473183500] [2020-07-20 05:47:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:47:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:05,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:05,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:05,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473183500] [2020-07-20 05:47:05,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562681031] [2020-07-20 05:47:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@12e62a89 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:05,440 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@12e62a89 issued 3 check-sat command(s) [2020-07-20 05:47:05,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:05,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 05:47:05,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:05,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:05,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-07-20 05:47:05,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749033259] [2020-07-20 05:47:05,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 05:47:05,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:05,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 05:47:05,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-20 05:47:05,468 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 11 states. [2020-07-20 05:47:05,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:05,532 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-07-20 05:47:05,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 05:47:05,533 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-07-20 05:47:05,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:05,533 INFO L225 Difference]: With dead ends: 46 [2020-07-20 05:47:05,534 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 05:47:05,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-20 05:47:05,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 05:47:05,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-20 05:47:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 05:47:05,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 05:47:05,539 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-07-20 05:47:05,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:05,540 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 05:47:05,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 05:47:05,540 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 05:47:05,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 05:47:05,541 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:05,541 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:05,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:05,752 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:05,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:05,752 INFO L82 PathProgramCache]: Analyzing trace with hash -133817927, now seen corresponding path program 7 times [2020-07-20 05:47:05,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:05,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324861560] [2020-07-20 05:47:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:47:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:05,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324861560] [2020-07-20 05:47:05,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297485612] [2020-07-20 05:47:05,847 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49b83848 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 05:47:06,600 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@49b83848 issued 3 check-sat command(s) [2020-07-20 05:47:06,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:06,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 05:47:06,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:06,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:06,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-07-20 05:47:06,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055175341] [2020-07-20 05:47:06,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 05:47:06,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:06,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 05:47:06,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-20 05:47:06,626 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-20 05:47:06,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:06,703 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-07-20 05:47:06,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 05:47:06,704 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-07-20 05:47:06,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:06,705 INFO L225 Difference]: With dead ends: 48 [2020-07-20 05:47:06,705 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 05:47:06,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-20 05:47:06,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 05:47:06,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-20 05:47:06,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 05:47:06,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-07-20 05:47:06,711 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-07-20 05:47:06,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:06,711 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-07-20 05:47:06,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 05:47:06,712 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-07-20 05:47:06,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 05:47:06,712 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:06,713 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:06,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:06,921 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:06,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:06,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1903896357, now seen corresponding path program 8 times [2020-07-20 05:47:06,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:06,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632794973] [2020-07-20 05:47:06,923 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:47:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:07,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632794973] [2020-07-20 05:47:07,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468995438] [2020-07-20 05:47:07,037 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36bd385a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:08,228 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@36bd385a issued 3 check-sat command(s) [2020-07-20 05:47:08,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:08,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 05:47:08,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:08,256 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:08,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:08,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-07-20 05:47:08,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976973634] [2020-07-20 05:47:08,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 05:47:08,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:08,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 05:47:08,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-20 05:47:08,258 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-07-20 05:47:08,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:08,344 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-07-20 05:47:08,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 05:47:08,345 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-07-20 05:47:08,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:08,346 INFO L225 Difference]: With dead ends: 50 [2020-07-20 05:47:08,346 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 05:47:08,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-20 05:47:08,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 05:47:08,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-07-20 05:47:08,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-20 05:47:08,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-07-20 05:47:08,354 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-07-20 05:47:08,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:08,355 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-07-20 05:47:08,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 05:47:08,355 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-07-20 05:47:08,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 05:47:08,356 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:08,356 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:08,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-20 05:47:08,564 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:08,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:08,565 INFO L82 PathProgramCache]: Analyzing trace with hash -2142218371, now seen corresponding path program 9 times [2020-07-20 05:47:08,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:08,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725001716] [2020-07-20 05:47:08,566 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:47:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:08,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725001716] [2020-07-20 05:47:08,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792801107] [2020-07-20 05:47:08,675 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35ed71b6 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 05:47:09,990 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@35ed71b6 issued 3 check-sat command(s) [2020-07-20 05:47:09,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:09,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 05:47:09,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:10,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:10,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-07-20 05:47:10,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587890500] [2020-07-20 05:47:10,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 05:47:10,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:10,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 05:47:10,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-20 05:47:10,018 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2020-07-20 05:47:10,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:10,127 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-07-20 05:47:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 05:47:10,128 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-07-20 05:47:10,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:10,129 INFO L225 Difference]: With dead ends: 52 [2020-07-20 05:47:10,129 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 05:47:10,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-20 05:47:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 05:47:10,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-07-20 05:47:10,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 05:47:10,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 05:47:10,139 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-07-20 05:47:10,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:10,140 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 05:47:10,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 05:47:10,140 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 05:47:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 05:47:10,143 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:10,144 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:10,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:10,355 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:10,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:10,356 INFO L82 PathProgramCache]: Analyzing trace with hash 758560159, now seen corresponding path program 10 times [2020-07-20 05:47:10,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:10,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908498487] [2020-07-20 05:47:10,357 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:47:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:10,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908498487] [2020-07-20 05:47:10,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497866373] [2020-07-20 05:47:10,501 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b21ec35 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:11,568 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2b21ec35 issued 3 check-sat command(s) [2020-07-20 05:47:11,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:11,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 05:47:11,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:11,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:11,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-07-20 05:47:11,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428202158] [2020-07-20 05:47:11,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 05:47:11,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:11,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 05:47:11,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-20 05:47:11,622 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-07-20 05:47:11,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:11,711 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-07-20 05:47:11,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 05:47:11,712 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-07-20 05:47:11,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:11,713 INFO L225 Difference]: With dead ends: 54 [2020-07-20 05:47:11,713 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 05:47:11,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-20 05:47:11,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 05:47:11,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-20 05:47:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 05:47:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-07-20 05:47:11,719 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-07-20 05:47:11,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:11,720 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-07-20 05:47:11,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 05:47:11,720 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-07-20 05:47:11,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 05:47:11,721 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:11,721 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:11,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:11,934 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:11,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:11,934 INFO L82 PathProgramCache]: Analyzing trace with hash 972952385, now seen corresponding path program 11 times [2020-07-20 05:47:11,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:11,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193748259] [2020-07-20 05:47:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:47:11,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:12,080 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:12,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193748259] [2020-07-20 05:47:12,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948758613] [2020-07-20 05:47:12,081 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bdb1057 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:13,917 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@bdb1057 issued 4 check-sat command(s) [2020-07-20 05:47:13,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:13,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 05:47:13,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:13,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:13,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2020-07-20 05:47:13,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078178670] [2020-07-20 05:47:13,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 05:47:13,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:13,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 05:47:13,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-20 05:47:13,964 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2020-07-20 05:47:14,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:14,068 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-07-20 05:47:14,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 05:47:14,069 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-07-20 05:47:14,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:14,070 INFO L225 Difference]: With dead ends: 56 [2020-07-20 05:47:14,070 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 05:47:14,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-20 05:47:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 05:47:14,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-20 05:47:14,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-20 05:47:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-07-20 05:47:14,078 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-07-20 05:47:14,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:14,079 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-07-20 05:47:14,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 05:47:14,080 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-07-20 05:47:14,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 05:47:14,080 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:14,080 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:14,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 05:47:14,286 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:14,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:14,287 INFO L82 PathProgramCache]: Analyzing trace with hash 845451363, now seen corresponding path program 12 times [2020-07-20 05:47:14,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:14,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116085676] [2020-07-20 05:47:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:47:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:14,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:14,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116085676] [2020-07-20 05:47:14,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858616455] [2020-07-20 05:47:14,445 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7344518a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:16,043 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7344518a issued 3 check-sat command(s) [2020-07-20 05:47:16,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:16,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 05:47:16,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:16,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:16,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2020-07-20 05:47:16,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368837423] [2020-07-20 05:47:16,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 05:47:16,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:16,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 05:47:16,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-07-20 05:47:16,075 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 17 states. [2020-07-20 05:47:16,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:16,190 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-07-20 05:47:16,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 05:47:16,191 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-07-20 05:47:16,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:16,192 INFO L225 Difference]: With dead ends: 58 [2020-07-20 05:47:16,192 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 05:47:16,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-07-20 05:47:16,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 05:47:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-07-20 05:47:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 05:47:16,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 05:47:16,199 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-07-20 05:47:16,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:16,199 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 05:47:16,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 05:47:16,199 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 05:47:16,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 05:47:16,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:16,200 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:16,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 05:47:16,406 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:16,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:16,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1423946491, now seen corresponding path program 13 times [2020-07-20 05:47:16,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:16,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808909894] [2020-07-20 05:47:16,408 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:47:16,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:16,569 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:16,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808909894] [2020-07-20 05:47:16,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860040761] [2020-07-20 05:47:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@19f1cca No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:21,959 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@19f1cca issued 4 check-sat command(s) [2020-07-20 05:47:21,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:21,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 05:47:21,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:22,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:22,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2020-07-20 05:47:22,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136834576] [2020-07-20 05:47:22,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 05:47:22,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:22,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 05:47:22,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-20 05:47:22,025 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 18 states. [2020-07-20 05:47:22,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:22,122 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-07-20 05:47:22,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 05:47:22,123 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-07-20 05:47:22,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:22,124 INFO L225 Difference]: With dead ends: 60 [2020-07-20 05:47:22,124 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 05:47:22,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-20 05:47:22,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 05:47:22,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-07-20 05:47:22,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-20 05:47:22,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-07-20 05:47:22,129 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-07-20 05:47:22,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:22,130 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-07-20 05:47:22,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 05:47:22,130 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-07-20 05:47:22,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-20 05:47:22,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:22,131 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:22,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-20 05:47:22,336 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:22,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:22,337 INFO L82 PathProgramCache]: Analyzing trace with hash -471897817, now seen corresponding path program 14 times [2020-07-20 05:47:22,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:22,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629315929] [2020-07-20 05:47:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:47:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:22,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629315929] [2020-07-20 05:47:22,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444432190] [2020-07-20 05:47:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@118207e0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:28,810 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@118207e0 issued 4 check-sat command(s) [2020-07-20 05:47:28,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:28,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 05:47:28,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:28,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:28,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2020-07-20 05:47:28,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409876956] [2020-07-20 05:47:28,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 05:47:28,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:28,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 05:47:28,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-20 05:47:28,914 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 19 states. [2020-07-20 05:47:28,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:29,000 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-07-20 05:47:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 05:47:29,000 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-07-20 05:47:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:29,001 INFO L225 Difference]: With dead ends: 62 [2020-07-20 05:47:29,001 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 05:47:29,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-20 05:47:29,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 05:47:29,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-07-20 05:47:29,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-20 05:47:29,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-07-20 05:47:29,010 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-07-20 05:47:29,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:29,013 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-07-20 05:47:29,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 05:47:29,013 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-07-20 05:47:29,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 05:47:29,014 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:29,014 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:29,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:29,221 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:29,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:29,222 INFO L82 PathProgramCache]: Analyzing trace with hash -381156151, now seen corresponding path program 15 times [2020-07-20 05:47:29,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:29,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533783739] [2020-07-20 05:47:29,223 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:47:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:29,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533783739] [2020-07-20 05:47:29,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409831730] [2020-07-20 05:47:29,457 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14e4da31 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:48:27,860 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14e4da31 issued 4 check-sat command(s) [2020-07-20 05:48:27,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:48:28,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 05:48:28,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:48:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:48:28,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:48:28,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2020-07-20 05:48:28,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425408876] [2020-07-20 05:48:28,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 05:48:28,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:48:28,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 05:48:28,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-20 05:48:28,840 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 20 states. [2020-07-20 05:48:28,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:48:28,954 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-07-20 05:48:28,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 05:48:28,955 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-07-20 05:48:28,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:48:28,956 INFO L225 Difference]: With dead ends: 64 [2020-07-20 05:48:28,956 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 05:48:28,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-20 05:48:28,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 05:48:28,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-07-20 05:48:28,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 05:48:28,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-20 05:48:28,962 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-07-20 05:48:28,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:48:28,962 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-20 05:48:28,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 05:48:28,962 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-20 05:48:28,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 05:48:28,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:48:28,963 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:48:29,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-20 05:48:29,173 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:48:29,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:48:29,174 INFO L82 PathProgramCache]: Analyzing trace with hash 922238955, now seen corresponding path program 16 times [2020-07-20 05:48:29,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:48:29,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847056853] [2020-07-20 05:48:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:48:29,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:29,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:48:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:48:29,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847056853] [2020-07-20 05:48:29,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089307414] [2020-07-20 05:48:29,403 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e196e00 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:49:40,543 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e196e00 issued 4 check-sat command(s) [2020-07-20 05:49:40,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:49:41,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 05:49:41,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:49:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:49:41,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:49:41,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2020-07-20 05:49:41,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190196866] [2020-07-20 05:49:41,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 05:49:41,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:49:41,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 05:49:41,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-20 05:49:41,685 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 21 states. [2020-07-20 05:49:41,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:49:41,778 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-07-20 05:49:41,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 05:49:41,779 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-07-20 05:49:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:49:41,779 INFO L225 Difference]: With dead ends: 66 [2020-07-20 05:49:41,780 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 05:49:41,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-20 05:49:41,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 05:49:41,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-07-20 05:49:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-20 05:49:41,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-07-20 05:49:41,789 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-07-20 05:49:41,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:49:41,794 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-07-20 05:49:41,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 05:49:41,795 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-07-20 05:49:41,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 05:49:41,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:49:41,795 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:49:41,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 05:49:41,996 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:49:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:49:41,996 INFO L82 PathProgramCache]: Analyzing trace with hash -645514611, now seen corresponding path program 17 times [2020-07-20 05:49:41,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:49:41,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563461875] [2020-07-20 05:49:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:49:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:49:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:49:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:49:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:49:42,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563461875] [2020-07-20 05:49:42,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245061500] [2020-07-20 05:49:42,234 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56bd3537 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:50:39,291 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56bd3537 issued 4 check-sat command(s) [2020-07-20 05:50:39,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:50:39,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 05:50:39,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:50:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:50:40,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:50:40,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2020-07-20 05:50:40,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504852209] [2020-07-20 05:50:40,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 05:50:40,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:50:40,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 05:50:40,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-20 05:50:40,019 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 22 states. [2020-07-20 05:50:40,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:50:40,116 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-07-20 05:50:40,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 05:50:40,117 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-07-20 05:50:40,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:50:40,118 INFO L225 Difference]: With dead ends: 68 [2020-07-20 05:50:40,118 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 05:50:40,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-20 05:50:40,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 05:50:40,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-07-20 05:50:40,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 05:50:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-07-20 05:50:40,122 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-07-20 05:50:40,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:50:40,123 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-07-20 05:50:40,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 05:50:40,123 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-07-20 05:50:40,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 05:50:40,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:50:40,124 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:50:40,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:50:40,327 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:50:40,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:50:40,328 INFO L82 PathProgramCache]: Analyzing trace with hash 276829359, now seen corresponding path program 18 times [2020-07-20 05:50:40,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:50:40,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595779546] [2020-07-20 05:50:40,329 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:50:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:50:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:50:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:50:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:50:40,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595779546] [2020-07-20 05:50:40,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851010593] [2020-07-20 05:50:40,613 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@761dbcff No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:56:04,048 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@761dbcff issued 4 check-sat command(s) [2020-07-20 05:56:04,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:56:14,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 05:56:14,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:56:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:56:14,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:56:14,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2020-07-20 05:56:14,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991138858] [2020-07-20 05:56:14,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 05:56:14,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:56:14,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 05:56:14,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-20 05:56:14,742 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 23 states. [2020-07-20 05:56:14,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:56:14,859 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-07-20 05:56:14,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 05:56:14,860 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-07-20 05:56:14,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:56:14,861 INFO L225 Difference]: With dead ends: 70 [2020-07-20 05:56:14,861 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 05:56:14,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-20 05:56:14,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 05:56:14,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-07-20 05:56:14,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 05:56:14,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-20 05:56:14,866 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-07-20 05:56:14,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:56:14,866 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-20 05:56:14,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 05:56:14,866 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-20 05:56:14,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 05:56:14,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:56:14,867 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:56:15,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:56:15,078 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:56:15,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:56:15,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1886121553, now seen corresponding path program 19 times [2020-07-20 05:56:15,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:56:15,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190106390] [2020-07-20 05:56:15,080 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 05:56:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:56:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:56:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:56:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:56:15,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190106390] [2020-07-20 05:56:15,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911747541] [2020-07-20 05:56:15,362 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@43af107 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:00:41,419 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@43af107 issued 4 check-sat command(s) [2020-07-20 06:00:41,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 06:00:48,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 06:00:48,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 06:00:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 06:00:48,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 06:00:48,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2020-07-20 06:00:48,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271367369] [2020-07-20 06:00:48,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 06:00:48,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 06:00:48,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 06:00:48,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-07-20 06:00:48,749 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 24 states. [2020-07-20 06:00:48,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 06:00:48,855 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-07-20 06:00:48,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 06:00:48,857 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-07-20 06:00:48,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 06:00:48,857 INFO L225 Difference]: With dead ends: 71 [2020-07-20 06:00:48,858 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 06:00:48,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-07-20 06:00:48,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 06:00:48,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-20 06:00:48,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 06:00:48,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-07-20 06:00:48,862 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-07-20 06:00:48,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 06:00:48,862 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-07-20 06:00:48,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 06:00:48,863 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-07-20 06:00:48,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 06:00:48,863 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 06:00:48,863 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 06:00:49,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 06:00:49,074 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 06:00:49,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 06:00:49,075 INFO L82 PathProgramCache]: Analyzing trace with hash -2067273869, now seen corresponding path program 20 times [2020-07-20 06:00:49,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 06:00:49,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165711596] [2020-07-20 06:00:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@11d284a4 [2020-07-20 06:00:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 06:00:49,182 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 06:00:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 06:00:49,277 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 06:00:49,309 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 06:00:49,309 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 06:00:49,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-20 06:00:49,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 06:00:49 BoogieIcfgContainer [2020-07-20 06:00:49,353 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 06:00:49,356 INFO L168 Benchmark]: Toolchain (without parser) took 828522.91 ms. Allocated memory was 140.5 MB in the beginning and 256.4 MB in the end (delta: 115.9 MB). Free memory was 105.3 MB in the beginning and 159.0 MB in the end (delta: -53.7 MB). Peak memory consumption was 62.1 MB. Max. memory is 7.1 GB. [2020-07-20 06:00:49,356 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 140.5 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 06:00:49,357 INFO L168 Benchmark]: CACSL2BoogieTranslator took 370.60 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 104.8 MB in the beginning and 183.1 MB in the end (delta: -78.3 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-07-20 06:00:49,357 INFO L168 Benchmark]: Boogie Preprocessor took 70.09 ms. Allocated memory is still 203.9 MB. Free memory was 183.1 MB in the beginning and 180.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-07-20 06:00:49,358 INFO L168 Benchmark]: RCFGBuilder took 375.44 ms. Allocated memory is still 203.9 MB. Free memory was 180.8 MB in the beginning and 165.4 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. [2020-07-20 06:00:49,358 INFO L168 Benchmark]: TraceAbstraction took 827697.13 ms. Allocated memory was 203.9 MB in the beginning and 256.4 MB in the end (delta: 52.4 MB). Free memory was 164.7 MB in the beginning and 159.0 MB in the end (delta: 5.7 MB). Peak memory consumption was 58.2 MB. Max. memory is 7.1 GB. [2020-07-20 06:00:49,361 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 140.5 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 370.60 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 104.8 MB in the beginning and 183.1 MB in the end (delta: -78.3 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 70.09 ms. Allocated memory is still 203.9 MB. Free memory was 183.1 MB in the beginning and 180.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 375.44 ms. Allocated memory is still 203.9 MB. Free memory was 180.8 MB in the beginning and 165.4 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 827697.13 ms. Allocated memory was 203.9 MB in the beginning and 256.4 MB in the end (delta: 52.4 MB). Free memory was 164.7 MB in the beginning and 159.0 MB in the end (delta: 5.7 MB). Peak memory consumption was 58.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 VAL [ad1={2:0}, j=0] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=1] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=2] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=3] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=4] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=5] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=6] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=7] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=8] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=9] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=10] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=11] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=12] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=13] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=14] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=15] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=16] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=17] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=18] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=19] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=20] [L17] COND FALSE !(j<20) VAL [ad1={2:0}, j=20] [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) VAL [\read(*pa)=0, ad1={2:0}, ad2={2:0}, i=10, j=20, pa={2:0}] [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) VAL [\old(b)=10, ad1={2:0}] [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) VAL [ad1={2:0}, ad2={2:0}, check(ad1, i)=0, i=10, j=20, pa={2:0}] [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() VAL [ad1={2:0}, ad2={2:0}, i=10, j=20, pa={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 827.5s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 365 SDtfs, 252 SDslu, 2032 SDs, 0 SdLazy, 1389 SolverSat, 70 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1039 GetRequests, 789 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 796.2s SatisfiabilityAnalysisTime, 24.1s InterpolantComputationTime, 1537 NumberOfCodeBlocks, 1463 NumberOfCodeBlocksAsserted, 87 NumberOfCheckSat, 1439 ConstructedInterpolants, 0 QuantifiedInterpolants, 131957 SizeOfPredicates, 19 NumberOfNonLiveVariables, 2901 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4940 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...