/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:12:11,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:12:11,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:12:11,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:12:11,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:12:11,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:12:11,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:12:11,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:12:11,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:12:11,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:12:11,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:12:11,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:12:11,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:12:11,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:12:11,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:12:11,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:12:11,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:12:11,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:12:11,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:12:11,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:12:11,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:12:11,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:12:11,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:12:11,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:12:11,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:12:11,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:12:11,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:12:11,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:12:11,534 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 17:12:11,553 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:12:11,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:12:11,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:12:11,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:12:11,556 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:12:11,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:12:11,557 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:12:11,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:12:11,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:12:11,557 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:12:11,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:12:11,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:12:11,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:12:11,559 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:12:11,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:12:11,560 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:12:11,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:12:11,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:12:11,560 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:12:11,560 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:12:11,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:12:11,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:12:11,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:12:11,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:12:11,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:12:11,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:12:11,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:11,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:12:11,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:12:11,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES 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 [2020-07-20 17:12:11,905 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:12:11,924 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:12:11,929 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:12:11,931 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:12:11,932 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:12:11,933 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c [2020-07-20 17:12:12,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd2925674/24d6127dd2954beeb564aa6d80789379/FLAGcbdc2a32d [2020-07-20 17:12:12,681 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:12:12,682 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c [2020-07-20 17:12:12,699 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd2925674/24d6127dd2954beeb564aa6d80789379/FLAGcbdc2a32d [2020-07-20 17:12:12,940 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd2925674/24d6127dd2954beeb564aa6d80789379 [2020-07-20 17:12:12,955 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:12:12,959 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:12:12,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:12:12,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:12:12,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:12:12,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:12:12" (1/1) ... [2020-07-20 17:12:12,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a4ebc22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:12, skipping insertion in model container [2020-07-20 17:12:12,973 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:12:12" (1/1) ... [2020-07-20 17:12:12,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:12:13,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:12:13,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:12:13,294 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:12:13,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:12:13,347 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:12:13,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:13 WrapperNode [2020-07-20 17:12:13,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:12:13,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:12:13,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:12:13,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:12:13,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:13" (1/1) ... [2020-07-20 17:12:13,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:13" (1/1) ... [2020-07-20 17:12:13,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:13" (1/1) ... [2020-07-20 17:12:13,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:13" (1/1) ... [2020-07-20 17:12:13,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:13" (1/1) ... [2020-07-20 17:12:13,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:13" (1/1) ... [2020-07-20 17:12:13,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:13" (1/1) ... [2020-07-20 17:12:13,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:12:13,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:12:13,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:12:13,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:12:13,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:13" (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 17:12:13,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:12:13,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:12:13,595 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:12:13,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:12:13,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 17:12:13,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:12:13,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-07-20 17:12:13,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:12:13,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:12:13,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:12:13,897 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:12:13,897 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 17:12:13,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:12:13 BoogieIcfgContainer [2020-07-20 17:12:13,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:12:13,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:12:13,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:12:13,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:12:13,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:12:12" (1/3) ... [2020-07-20 17:12:13,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72109daa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:12:13, skipping insertion in model container [2020-07-20 17:12:13,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:12:13" (2/3) ... [2020-07-20 17:12:13,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72109daa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:12:13, skipping insertion in model container [2020-07-20 17:12:13,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:12:13" (3/3) ... [2020-07-20 17:12:13,923 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_1b.cil.c [2020-07-20 17:12:13,944 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:12:13,959 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:12:13,995 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:12:14,045 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:12:14,045 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:12:14,045 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:12:14,046 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:12:14,046 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:12:14,046 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:12:14,046 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:12:14,046 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:12:14,079 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-20 17:12:14,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-20 17:12:14,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:12:14,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:12:14,091 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:12:14,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:12:14,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2134687016, now seen corresponding path program 1 times [2020-07-20 17:12:14,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:12:14,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006689454] [2020-07-20 17:12:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:14,185 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 17:12:14,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:12:14,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 17:12:14,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:12:14,260 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 17:12:14,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:12:14,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006689454] [2020-07-20 17:12:14,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:12:14,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:12:14,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736987668] [2020-07-20 17:12:14,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:12:14,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:12:14,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:12:14,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:12:14,295 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-07-20 17:12:14,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:12:14,432 INFO L93 Difference]: Finished difference Result 70 states and 116 transitions. [2020-07-20 17:12:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:12:14,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-07-20 17:12:14,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:12:14,453 INFO L225 Difference]: With dead ends: 70 [2020-07-20 17:12:14,453 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 17:12:14,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 17:12:14,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 17:12:14,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 17:12:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 17:12:14,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2020-07-20 17:12:14,526 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 8 [2020-07-20 17:12:14,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:12:14,527 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2020-07-20 17:12:14,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:12:14,528 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2020-07-20 17:12:14,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 17:12:14,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:12:14,529 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:12:14,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:14,745 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:12:14,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:12:14,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1966827798, now seen corresponding path program 1 times [2020-07-20 17:12:14,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:12:14,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305955000] [2020-07-20 17:12:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:14,778 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:12:14,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:12:14,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 17:12:14,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:12:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:12:14,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:12:14,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305955000] [2020-07-20 17:12:14,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:12:14,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:12:14,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092189121] [2020-07-20 17:12:14,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:12:14,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:12:14,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:12:14,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:12:14,804 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand 3 states. [2020-07-20 17:12:14,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:12:14,908 INFO L93 Difference]: Finished difference Result 73 states and 110 transitions. [2020-07-20 17:12:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:12:14,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-20 17:12:14,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:12:14,911 INFO L225 Difference]: With dead ends: 73 [2020-07-20 17:12:14,912 INFO L226 Difference]: Without dead ends: 55 [2020-07-20 17:12:14,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 17:12:14,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-20 17:12:14,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-07-20 17:12:14,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 17:12:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 78 transitions. [2020-07-20 17:12:14,929 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 78 transitions. Word has length 13 [2020-07-20 17:12:14,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:12:14,930 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 78 transitions. [2020-07-20 17:12:14,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:12:14,930 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 78 transitions. [2020-07-20 17:12:14,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 17:12:14,932 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:12:14,932 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:12:15,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:15,149 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:12:15,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:12:15,150 INFO L82 PathProgramCache]: Analyzing trace with hash 280007728, now seen corresponding path program 1 times [2020-07-20 17:12:15,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:12:15,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442541397] [2020-07-20 17:12:15,152 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:15,205 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:12:15,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:12:15,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 17:12:15,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:12:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 17:12:15,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:12:15,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442541397] [2020-07-20 17:12:15,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:12:15,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:12:15,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331461038] [2020-07-20 17:12:15,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:12:15,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:12:15,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:12:15,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:12:15,231 INFO L87 Difference]: Start difference. First operand 55 states and 78 transitions. Second operand 3 states. [2020-07-20 17:12:15,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:12:15,315 INFO L93 Difference]: Finished difference Result 107 states and 157 transitions. [2020-07-20 17:12:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:12:15,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-20 17:12:15,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:12:15,318 INFO L225 Difference]: With dead ends: 107 [2020-07-20 17:12:15,318 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 17:12:15,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 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 17:12:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 17:12:15,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-07-20 17:12:15,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-20 17:12:15,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 103 transitions. [2020-07-20 17:12:15,335 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 103 transitions. Word has length 20 [2020-07-20 17:12:15,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:12:15,336 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 103 transitions. [2020-07-20 17:12:15,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:12:15,336 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 103 transitions. [2020-07-20 17:12:15,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 17:12:15,341 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:12:15,342 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:12:15,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:15,557 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:12:15,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:12:15,558 INFO L82 PathProgramCache]: Analyzing trace with hash 885328029, now seen corresponding path program 1 times [2020-07-20 17:12:15,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:12:15,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970466121] [2020-07-20 17:12:15,559 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:15,619 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:12:15,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:12:15,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 17:12:15,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:12:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 17:12:15,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:12:15,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970466121] [2020-07-20 17:12:15,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:12:15,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:12:15,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136553072] [2020-07-20 17:12:15,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:12:15,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:12:15,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:12:15,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:12:15,666 INFO L87 Difference]: Start difference. First operand 71 states and 103 transitions. Second operand 3 states. [2020-07-20 17:12:15,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:12:15,786 INFO L93 Difference]: Finished difference Result 141 states and 205 transitions. [2020-07-20 17:12:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:12:15,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-20 17:12:15,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:12:15,789 INFO L225 Difference]: With dead ends: 141 [2020-07-20 17:12:15,789 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 17:12:15,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 17:12:15,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 17:12:15,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2020-07-20 17:12:15,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 17:12:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2020-07-20 17:12:15,815 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 23 [2020-07-20 17:12:15,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:12:15,816 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2020-07-20 17:12:15,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:12:15,817 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2020-07-20 17:12:15,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 17:12:15,819 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:12:15,819 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:12:16,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:16,028 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:12:16,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:12:16,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1155086362, now seen corresponding path program 1 times [2020-07-20 17:12:16,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:12:16,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092692193] [2020-07-20 17:12:16,031 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:16,061 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 17:12:16,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:12:16,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:12:16,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:12:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 17:12:16,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:12:16,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092692193] [2020-07-20 17:12:16,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:12:16,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 17:12:16,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783498771] [2020-07-20 17:12:16,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 17:12:16,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:12:16,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 17:12:16,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 17:12:16,096 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand 3 states. [2020-07-20 17:12:16,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:12:16,139 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2020-07-20 17:12:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 17:12:16,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-07-20 17:12:16,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:12:16,141 INFO L225 Difference]: With dead ends: 99 [2020-07-20 17:12:16,141 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 17:12:16,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 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 17:12:16,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 17:12:16,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 17:12:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 17:12:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 17:12:16,144 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2020-07-20 17:12:16,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:12:16,145 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 17:12:16,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 17:12:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 17:12:16,145 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 17:12:16,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:12:16,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 17:12:16,695 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 17:12:16,696 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:12:16,696 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 17:12:16,696 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 17:12:16,696 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 17:12:16,697 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 17:12:16,697 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 8 140) no Hoare annotation was computed. [2020-07-20 17:12:16,697 INFO L268 CegarLoopResult]: For program point L77-1(lines 53 106) no Hoare annotation was computed. [2020-07-20 17:12:16,697 INFO L268 CegarLoopResult]: For program point L69(lines 69 73) no Hoare annotation was computed. [2020-07-20 17:12:16,697 INFO L268 CegarLoopResult]: For program point L24(lines 24 127) no Hoare annotation was computed. [2020-07-20 17:12:16,697 INFO L268 CegarLoopResult]: For program point L57-1(lines 53 106) no Hoare annotation was computed. [2020-07-20 17:12:16,698 INFO L268 CegarLoopResult]: For program point L49(lines 49 108) no Hoare annotation was computed. [2020-07-20 17:12:16,698 INFO L268 CegarLoopResult]: For program point L45(lines 45 110) no Hoare annotation was computed. [2020-07-20 17:12:16,698 INFO L271 CegarLoopResult]: At program point L136(lines 8 140) the Hoare annotation is: true [2020-07-20 17:12:16,699 INFO L264 CegarLoopResult]: At program point L99(lines 17 134) the Hoare annotation is: (or (and (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3) (<= 8640 main_~s__state~0)) (<= main_~blastFlag~0 2)) [2020-07-20 17:12:16,699 INFO L268 CegarLoopResult]: For program point L95(lines 95 97) no Hoare annotation was computed. [2020-07-20 17:12:16,699 INFO L268 CegarLoopResult]: For program point L29(lines 29 124) no Hoare annotation was computed. [2020-07-20 17:12:16,699 INFO L264 CegarLoopResult]: At program point L25(lines 24 127) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-20 17:12:16,700 INFO L264 CegarLoopResult]: At program point L50(lines 49 108) the Hoare annotation is: (let ((.cse0 (<= 8640 main_~s__state~0))) (or (and (<= main_~blastFlag~0 2) .cse0) (and (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3) .cse0))) [2020-07-20 17:12:16,700 INFO L264 CegarLoopResult]: At program point L46(lines 45 110) the Hoare annotation is: (let ((.cse0 (<= 8640 main_~s__state~0))) (or (and (<= main_~blastFlag~0 2) .cse0) (and (not (= 0 main_~s__hit~0)) (<= main_~blastFlag~0 3) .cse0))) [2020-07-20 17:12:16,700 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 8 140) no Hoare annotation was computed. [2020-07-20 17:12:16,701 INFO L264 CegarLoopResult]: At program point L96(lines 8 140) the Hoare annotation is: false [2020-07-20 17:12:16,701 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 138) no Hoare annotation was computed. [2020-07-20 17:12:16,701 INFO L264 CegarLoopResult]: At program point L30(lines 29 124) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-07-20 17:12:16,701 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 8 140) the Hoare annotation is: true [2020-07-20 17:12:16,702 INFO L268 CegarLoopResult]: For program point L92-1(lines 53 106) no Hoare annotation was computed. [2020-07-20 17:12:16,702 INFO L268 CegarLoopResult]: For program point L88-1(lines 53 106) no Hoare annotation was computed. [2020-07-20 17:12:16,702 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-07-20 17:12:16,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:12:16 BoogieIcfgContainer [2020-07-20 17:12:16,733 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:12:16,737 INFO L168 Benchmark]: Toolchain (without parser) took 3779.02 ms. Allocated memory was 137.4 MB in the beginning and 232.8 MB in the end (delta: 95.4 MB). Free memory was 102.1 MB in the beginning and 186.1 MB in the end (delta: -84.0 MB). Peak memory consumption was 86.5 MB. Max. memory is 7.1 GB. [2020-07-20 17:12:16,738 INFO L168 Benchmark]: CDTParser took 0.42 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 17:12:16,739 INFO L168 Benchmark]: CACSL2BoogieTranslator took 388.35 ms. Allocated memory is still 137.4 MB. Free memory was 101.7 MB in the beginning and 91.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-20 17:12:16,741 INFO L168 Benchmark]: Boogie Preprocessor took 153.33 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 91.5 MB in the beginning and 180.6 MB in the end (delta: -89.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:12:16,743 INFO L168 Benchmark]: RCFGBuilder took 402.11 ms. Allocated memory is still 201.9 MB. Free memory was 180.0 MB in the beginning and 165.6 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:12:16,745 INFO L168 Benchmark]: TraceAbstraction took 2824.00 ms. Allocated memory was 201.9 MB in the beginning and 232.8 MB in the end (delta: 30.9 MB). Free memory was 164.9 MB in the beginning and 186.1 MB in the end (delta: -21.2 MB). Peak memory consumption was 84.9 MB. Max. memory is 7.1 GB. [2020-07-20 17:12:16,751 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 388.35 ms. Allocated memory is still 137.4 MB. Free memory was 101.7 MB in the beginning and 91.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 153.33 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 91.5 MB in the beginning and 180.6 MB in the end (delta: -89.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 402.11 ms. Allocated memory is still 201.9 MB. Free memory was 180.0 MB in the beginning and 165.6 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2824.00 ms. Allocated memory was 201.9 MB in the beginning and 232.8 MB in the end (delta: 30.9 MB). Free memory was 164.9 MB in the beginning and 186.1 MB in the end (delta: -21.2 MB). Peak memory consumption was 84.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 138]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (blastFlag <= 2 && 8640 <= s__state) || ((!(0 == s__hit) && blastFlag <= 3) && 8640 <= s__state) - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((!(0 == s__hit) && blastFlag <= 3) && 8640 <= s__state) || blastFlag <= 2 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: (blastFlag <= 2 && 8640 <= s__state) || ((!(0 == s__hit) && blastFlag <= 3) && 8640 <= s__state) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.3s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 147 SDtfs, 81 SDslu, 98 SDs, 0 SdLazy, 77 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 11 PreInvPairs, 31 NumberOfFragments, 65 HoareAnnotationTreeSize, 11 FomulaSimplifications, 123 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 18 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 101 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 4434 SizeOfPredicates, 4 NumberOfNonLiveVariables, 152 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 40/40 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 correct! Received shutdown request...