/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:20:01,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:20:01,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:20:01,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:20:01,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:20:01,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:20:01,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:20:01,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:20:01,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:20:01,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:20:01,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:20:01,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:20:01,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:20:01,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:20:01,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:20:01,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:20:01,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:20:01,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:20:01,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:20:01,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:20:01,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:20:01,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:20:01,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:20:01,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:20:01,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:20:01,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:20:01,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:20:01,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:20:01,224 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-19 23:20:01,248 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:20:01,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:20:01,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:20:01,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:20:01,250 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:20:01,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:20:01,251 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:20:01,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:20:01,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:20:01,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:20:01,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:20:01,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:20:01,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:20:01,253 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:20:01,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:20:01,254 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:20:01,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:20:01,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:20:01,254 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:20:01,254 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:20:01,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:20:01,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:20:01,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:20:01,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:20:01,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:20:01,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:20:01,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:20:01,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:20:01,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:20:01,256 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-19 23:20:01,600 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:20:01,614 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:20:01,618 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:20:01,619 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:20:01,620 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:20:01,620 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-2.c [2020-07-19 23:20:01,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5f8ca4ec/c538ceb111d2421aa81c833941001649/FLAG9da1f223e [2020-07-19 23:20:02,148 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:20:02,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test25-2.c [2020-07-19 23:20:02,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5f8ca4ec/c538ceb111d2421aa81c833941001649/FLAG9da1f223e [2020-07-19 23:20:02,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5f8ca4ec/c538ceb111d2421aa81c833941001649 [2020-07-19 23:20:02,508 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:20:02,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:20:02,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:20:02,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:20:02,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:20:02,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:20:02" (1/1) ... [2020-07-19 23:20:02,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21f50e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:02, skipping insertion in model container [2020-07-19 23:20:02,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:20:02" (1/1) ... [2020-07-19 23:20:02,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:20:02,548 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:20:02,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:20:02,789 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:20:02,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:20:02,911 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:20:02,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:02 WrapperNode [2020-07-19 23:20:02,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:20:02,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:20:02,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:20:02,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:20:02,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:02" (1/1) ... [2020-07-19 23:20:02,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:02" (1/1) ... [2020-07-19 23:20:02,934 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:02" (1/1) ... [2020-07-19 23:20:02,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:02" (1/1) ... [2020-07-19 23:20:02,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:02" (1/1) ... [2020-07-19 23:20:02,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:02" (1/1) ... [2020-07-19 23:20:02,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:02" (1/1) ... [2020-07-19 23:20:02,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:20:02,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:20:02,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:20:02,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:20:02,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:20:03,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:20:03,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:20:03,026 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-19 23:20:03,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:20:03,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:20:03,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:20:03,027 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-19 23:20:03,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-19 23:20:03,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 23:20:03,027 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:20:03,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 23:20:03,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 23:20:03,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-19 23:20:03,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 23:20:03,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:20:03,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:20:03,310 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:20:03,310 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-19 23:20:03,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:20:03 BoogieIcfgContainer [2020-07-19 23:20:03,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:20:03,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:20:03,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:20:03,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:20:03,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:20:02" (1/3) ... [2020-07-19 23:20:03,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e7567f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:20:03, skipping insertion in model container [2020-07-19 23:20:03,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:02" (2/3) ... [2020-07-19 23:20:03,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77e7567f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:20:03, skipping insertion in model container [2020-07-19 23:20:03,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:20:03" (3/3) ... [2020-07-19 23:20:03,323 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-2.c [2020-07-19 23:20:03,335 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:20:03,343 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:20:03,359 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:20:03,386 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:20:03,386 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:20:03,386 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:20:03,387 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:20:03,387 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:20:03,387 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:20:03,387 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:20:03,387 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:20:03,408 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-19 23:20:03,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-19 23:20:03,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:20:03,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:20:03,416 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:20:03,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:20:03,422 INFO L82 PathProgramCache]: Analyzing trace with hash -899836778, now seen corresponding path program 1 times [2020-07-19 23:20:03,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:20:03,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916040752] [2020-07-19 23:20:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40935629 [2020-07-19 23:20:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:20:03,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916040752] [2020-07-19 23:20:03,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:20:03,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 23:20:03,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252816611] [2020-07-19 23:20:03,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 23:20:03,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:20:03,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 23:20:03,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 23:20:03,682 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-07-19 23:20:03,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:20:03,779 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-07-19 23:20:03,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 23:20:03,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-19 23:20:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:20:03,796 INFO L225 Difference]: With dead ends: 42 [2020-07-19 23:20:03,796 INFO L226 Difference]: Without dead ends: 20 [2020-07-19 23:20:03,803 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 [2020-07-19 23:20:03,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-19 23:20:03,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-19 23:20:03,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-19 23:20:03,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-19 23:20:03,858 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-07-19 23:20:03,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:20:03,859 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-19 23:20:03,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 23:20:03,860 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-19 23:20:03,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-19 23:20:03,861 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:20:03,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:20:03,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:20:03,862 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:20:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:20:03,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1137678901, now seen corresponding path program 1 times [2020-07-19 23:20:03,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:20:03,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953132324] [2020-07-19 23:20:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40935629 [2020-07-19 23:20:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:20:03,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953132324] [2020-07-19 23:20:03,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:20:03,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 23:20:03,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62729874] [2020-07-19 23:20:03,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 23:20:03,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:20:03,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 23:20:03,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 23:20:03,971 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-07-19 23:20:04,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:20:04,037 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-07-19 23:20:04,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 23:20:04,038 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-07-19 23:20:04,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:20:04,039 INFO L225 Difference]: With dead ends: 34 [2020-07-19 23:20:04,040 INFO L226 Difference]: Without dead ends: 22 [2020-07-19 23:20:04,041 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 [2020-07-19 23:20:04,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-19 23:20:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-19 23:20:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 23:20:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-19 23:20:04,048 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-07-19 23:20:04,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:20:04,049 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-19 23:20:04,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 23:20:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-19 23:20:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 23:20:04,050 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:20:04,050 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] [2020-07-19 23:20:04,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:20:04,051 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:20:04,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:20:04,052 INFO L82 PathProgramCache]: Analyzing trace with hash 278779309, now seen corresponding path program 1 times [2020-07-19 23:20:04,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:20:04,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970910538] [2020-07-19 23:20:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40935629 [2020-07-19 23:20:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:20:04,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970910538] [2020-07-19 23:20:04,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394635441] [2020-07-19 23:20:04,172 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@761445a0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:20:04,292 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@761445a0 issued 3 check-sat command(s) [2020-07-19 23:20:04,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:20:04,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-19 23:20:04,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:20:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:20:04,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:20:04,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-19 23:20:04,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477842690] [2020-07-19 23:20:04,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 23:20:04,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:20:04,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 23:20:04,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:20:04,343 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-07-19 23:20:04,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:20:04,425 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-07-19 23:20:04,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:20:04,426 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-19 23:20:04,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:20:04,427 INFO L225 Difference]: With dead ends: 36 [2020-07-19 23:20:04,428 INFO L226 Difference]: Without dead ends: 24 [2020-07-19 23:20:04,428 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 [2020-07-19 23:20:04,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-19 23:20:04,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-07-19 23:20:04,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-19 23:20:04,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-19 23:20:04,435 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-07-19 23:20:04,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:20:04,436 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-19 23:20:04,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 23:20:04,436 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-19 23:20:04,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 23:20:04,437 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:20:04,437 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] [2020-07-19 23:20:04,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 23:20:04,643 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:20:04,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:20:04,644 INFO L82 PathProgramCache]: Analyzing trace with hash -9513713, now seen corresponding path program 2 times [2020-07-19 23:20:04,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:20:04,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065239653] [2020-07-19 23:20:04,644 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40935629 [2020-07-19 23:20:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:04,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:20:04,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065239653] [2020-07-19 23:20:04,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211581277] [2020-07-19 23:20:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e23ca0a No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:20:04,885 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3e23ca0a issued 3 check-sat command(s) [2020-07-19 23:20:04,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:20:04,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-19 23:20:04,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:20:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:20:04,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:20:04,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-19 23:20:04,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059052582] [2020-07-19 23:20:04,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 23:20:04,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:20:04,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 23:20:04,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:20:04,912 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-07-19 23:20:04,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:20:04,981 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-07-19 23:20:04,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:20:04,981 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-07-19 23:20:04,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:20:04,982 INFO L225 Difference]: With dead ends: 38 [2020-07-19 23:20:04,982 INFO L226 Difference]: Without dead ends: 26 [2020-07-19 23:20:04,983 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 [2020-07-19 23:20:04,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-19 23:20:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-07-19 23:20:04,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-19 23:20:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-07-19 23:20:04,989 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-07-19 23:20:04,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:20:04,989 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-07-19 23:20:04,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 23:20:04,990 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-07-19 23:20:04,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-19 23:20:04,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:20:04,991 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] [2020-07-19 23:20:05,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:20:05,205 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:20:05,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:20:05,206 INFO L82 PathProgramCache]: Analyzing trace with hash 2113766385, now seen corresponding path program 3 times [2020-07-19 23:20:05,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:20:05,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369014846] [2020-07-19 23:20:05,207 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40935629 [2020-07-19 23:20:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:20:05,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369014846] [2020-07-19 23:20:05,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094389689] [2020-07-19 23:20:05,303 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f347471 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:20:05,559 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f347471 issued 3 check-sat command(s) [2020-07-19 23:20:05,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:20:05,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 23:20:05,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:20:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:20:05,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:20:05,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-19 23:20:05,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075027777] [2020-07-19 23:20:05,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:20:05,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:20:05,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:20:05,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:20:05,592 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-07-19 23:20:05,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:20:05,677 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-07-19 23:20:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:20:05,678 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-07-19 23:20:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:20:05,679 INFO L225 Difference]: With dead ends: 40 [2020-07-19 23:20:05,679 INFO L226 Difference]: Without dead ends: 28 [2020-07-19 23:20:05,680 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 [2020-07-19 23:20:05,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-19 23:20:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-07-19 23:20:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 23:20:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-19 23:20:05,689 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-07-19 23:20:05,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:20:05,690 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-19 23:20:05,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:20:05,691 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-19 23:20:05,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 23:20:05,693 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:20:05,693 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] [2020-07-19 23:20:05,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:20:05,895 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:20:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:20:05,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1818492333, now seen corresponding path program 4 times [2020-07-19 23:20:05,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:20:05,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068902037] [2020-07-19 23:20:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40935629 [2020-07-19 23:20:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:20:06,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068902037] [2020-07-19 23:20:06,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844269951] [2020-07-19 23:20:06,040 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@211f03ec No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:20:06,480 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@211f03ec issued 3 check-sat command(s) [2020-07-19 23:20:06,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:20:06,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:20:06,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:20:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:20:06,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:20:06,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-07-19 23:20:06,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163578248] [2020-07-19 23:20:06,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 23:20:06,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:20:06,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 23:20:06,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:20:06,504 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-07-19 23:20:06,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:20:06,590 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-07-19 23:20:06,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:20:06,591 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-19 23:20:06,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:20:06,592 INFO L225 Difference]: With dead ends: 42 [2020-07-19 23:20:06,592 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 23:20:06,594 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 [2020-07-19 23:20:06,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 23:20:06,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-07-19 23:20:06,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-19 23:20:06,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-07-19 23:20:06,602 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-07-19 23:20:06,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:20:06,603 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-07-19 23:20:06,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 23:20:06,603 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-07-19 23:20:06,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 23:20:06,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:20:06,604 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] [2020-07-19 23:20:06,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:20:06,818 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:20:06,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:20:06,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1147899851, now seen corresponding path program 5 times [2020-07-19 23:20:06,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:20:06,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626003107] [2020-07-19 23:20:06,820 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40935629 [2020-07-19 23:20:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:20:06,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626003107] [2020-07-19 23:20:06,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492605123] [2020-07-19 23:20:06,929 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@441722bc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:20:08,329 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@441722bc issued 3 check-sat command(s) [2020-07-19 23:20:08,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:20:08,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 23:20:08,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:20:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:20:08,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:20:08,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-07-19 23:20:08,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307482854] [2020-07-19 23:20:08,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 23:20:08,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:20:08,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 23:20:08,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:20:08,362 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 10 states. [2020-07-19 23:20:08,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:20:08,437 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-07-19 23:20:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 23:20:08,438 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-19 23:20:08,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:20:08,439 INFO L225 Difference]: With dead ends: 44 [2020-07-19 23:20:08,439 INFO L226 Difference]: Without dead ends: 32 [2020-07-19 23:20:08,440 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 [2020-07-19 23:20:08,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-19 23:20:08,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-07-19 23:20:08,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-19 23:20:08,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-07-19 23:20:08,447 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-07-19 23:20:08,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:20:08,447 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-07-19 23:20:08,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 23:20:08,448 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-07-19 23:20:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-19 23:20:08,448 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:20:08,449 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] [2020-07-19 23:20:08,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 23:20:08,652 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:20:08,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:20:08,652 INFO L82 PathProgramCache]: Analyzing trace with hash -953619049, now seen corresponding path program 6 times [2020-07-19 23:20:08,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:20:08,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790741613] [2020-07-19 23:20:08,653 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40935629 [2020-07-19 23:20:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:20:08,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790741613] [2020-07-19 23:20:08,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739767184] [2020-07-19 23:20:08,789 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1e786939 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:20:10,093 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1e786939 issued 3 check-sat command(s) [2020-07-19 23:20:10,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:20:10,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:20:10,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:20:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:20:10,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:20:10,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-07-19 23:20:10,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900141771] [2020-07-19 23:20:10,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 23:20:10,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:20:10,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 23:20:10,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:20:10,124 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 11 states. [2020-07-19 23:20:10,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:20:10,220 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-07-19 23:20:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:20:10,221 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-07-19 23:20:10,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:20:10,222 INFO L225 Difference]: With dead ends: 46 [2020-07-19 23:20:10,222 INFO L226 Difference]: Without dead ends: 34 [2020-07-19 23:20:10,223 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 [2020-07-19 23:20:10,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-19 23:20:10,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-19 23:20:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 23:20:10,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-19 23:20:10,229 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-07-19 23:20:10,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:20:10,229 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-19 23:20:10,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 23:20:10,229 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-19 23:20:10,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-19 23:20:10,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:20:10,230 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] [2020-07-19 23:20:10,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:20:10,432 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:20:10,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:20:10,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1066637945, now seen corresponding path program 7 times [2020-07-19 23:20:10,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:20:10,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144075201] [2020-07-19 23:20:10,434 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40935629 [2020-07-19 23:20:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:10,587 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:20:10,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144075201] [2020-07-19 23:20:10,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519121632] [2020-07-19 23:20:10,589 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e3b983 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:30:21,546 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7e3b983 issued 3 check-sat command(s) [2020-07-19 23:30:21,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:30:34,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-19 23:30:34,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:30:34,907 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:30:34,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:30:34,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-07-19 23:30:34,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352651029] [2020-07-19 23:30:34,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 23:30:34,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:30:34,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 23:30:34,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:30:34,910 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-19 23:30:35,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:30:35,011 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-07-19 23:30:35,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 23:30:35,012 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-07-19 23:30:35,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:30:35,013 INFO L225 Difference]: With dead ends: 48 [2020-07-19 23:30:35,013 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 23:30:35,014 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 [2020-07-19 23:30:35,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 23:30:35,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-19 23:30:35,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-19 23:30:35,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-07-19 23:30:35,024 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-07-19 23:30:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:30:35,025 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-07-19 23:30:35,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 23:30:35,025 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-07-19 23:30:35,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-19 23:30:35,026 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:30:35,026 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] [2020-07-19 23:30:35,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:30:35,228 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:30:35,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:30:35,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1208391387, now seen corresponding path program 8 times [2020-07-19 23:30:35,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:30:35,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972104127] [2020-07-19 23:30:35,230 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@40935629 [2020-07-19 23:30:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:30:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:30:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:30:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:30:35,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972104127] [2020-07-19 23:30:35,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566287630] [2020-07-19 23:30:35,412 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@17c9ba65 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