/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 BIGGEST_EQUIVALENCE_CLASS --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/array-examples/sanfoundry_24-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:08:23,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:08:23,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:08:23,199 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:08:23,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:08:23,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:08:23,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:08:23,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:08:23,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:08:23,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:08:23,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:08:23,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:08:23,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:08:23,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:08:23,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:08:23,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:08:23,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:08:23,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:08:23,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:08:23,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:08:23,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:08:23,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:08:23,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:08:23,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:08:23,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:08:23,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:08:23,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:08:23,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:08:23,237 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 [2020-07-21 23:08:23,251 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:08:23,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:08:23,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:08:23,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:08:23,253 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:08:23,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:08:23,254 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:08:23,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:08:23,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:08:23,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:08:23,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:08:23,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:08:23,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:08:23,255 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:08:23,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:08:23,256 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:08:23,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:08:23,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:08:23,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:08:23,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:08:23,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:08:23,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:08:23,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:08:23,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:08:23,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:08:23,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:08:23,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:23,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:08:23,258 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:08:23,259 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 -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:08:23,564 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:08:23,578 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:08:23,581 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:08:23,583 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:08:23,583 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:08:23,584 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_24-1.i [2020-07-21 23:08:23,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b9366bce/999bbbe0fdef4372aef7f5549ab739ab/FLAG6f25744e9 [2020-07-21 23:08:24,141 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:08:24,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_24-1.i [2020-07-21 23:08:24,149 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b9366bce/999bbbe0fdef4372aef7f5549ab739ab/FLAG6f25744e9 [2020-07-21 23:08:24,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b9366bce/999bbbe0fdef4372aef7f5549ab739ab [2020-07-21 23:08:24,561 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:08:24,565 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:08:24,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:08:24,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:08:24,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:08:24,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:08:24" (1/1) ... [2020-07-21 23:08:24,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46ef6cbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:24, skipping insertion in model container [2020-07-21 23:08:24,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:08:24" (1/1) ... [2020-07-21 23:08:24,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:08:24,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:08:24,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:08:24,780 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:08:24,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:08:24,820 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:08:24,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:24 WrapperNode [2020-07-21 23:08:24,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:08:24,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:08:24,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:08:24,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:08:24,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:24" (1/1) ... [2020-07-21 23:08:24,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:24" (1/1) ... [2020-07-21 23:08:24,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:24" (1/1) ... [2020-07-21 23:08:24,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:24" (1/1) ... [2020-07-21 23:08:24,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:24" (1/1) ... [2020-07-21 23:08:24,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:24" (1/1) ... [2020-07-21 23:08:24,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:24" (1/1) ... [2020-07-21 23:08:24,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:08:24,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:08:24,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:08:24,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:08:24,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:24" (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 [2020-07-21 23:08:25,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:08:25,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:08:25,017 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:08:25,018 INFO L138 BoogieDeclarations]: Found implementation of procedure printEven [2020-07-21 23:08:25,018 INFO L138 BoogieDeclarations]: Found implementation of procedure printOdd [2020-07-21 23:08:25,018 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:08:25,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:08:25,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:08:25,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:08:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure printEven [2020-07-21 23:08:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure printOdd [2020-07-21 23:08:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:08:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 23:08:25,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 23:08:25,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 23:08:25,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 23:08:25,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:08:25,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:08:25,360 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:08:25,360 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 23:08:25,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:08:25 BoogieIcfgContainer [2020-07-21 23:08:25,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:08:25,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:08:25,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:08:25,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:08:25,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:08:24" (1/3) ... [2020-07-21 23:08:25,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f2d1d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:08:25, skipping insertion in model container [2020-07-21 23:08:25,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:24" (2/3) ... [2020-07-21 23:08:25,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f2d1d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:08:25, skipping insertion in model container [2020-07-21 23:08:25,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:08:25" (3/3) ... [2020-07-21 23:08:25,374 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_24-1.i [2020-07-21 23:08:25,385 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:08:25,392 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:08:25,406 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:08:25,432 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:08:25,432 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:08:25,432 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:08:25,432 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:08:25,432 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:08:25,433 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:08:25,433 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:08:25,433 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:08:25,450 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-07-21 23:08:25,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 23:08:25,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:25,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:08:25,458 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:25,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:25,463 INFO L82 PathProgramCache]: Analyzing trace with hash -762079996, now seen corresponding path program 1 times [2020-07-21 23:08:25,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:25,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786324144] [2020-07-21 23:08:25,471 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 [2020-07-21 23:08:25,557 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:08:25,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:25,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:08:25,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:08:25,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:08:25,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786324144] [2020-07-21 23:08:25,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:08:25,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:08:25,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389714772] [2020-07-21 23:08:25,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:08:25,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:25,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:08:25,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:08:25,659 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 5 states. [2020-07-21 23:08:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:25,815 INFO L93 Difference]: Finished difference Result 93 states and 129 transitions. [2020-07-21 23:08:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:08:25,816 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-21 23:08:25,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:25,826 INFO L225 Difference]: With dead ends: 93 [2020-07-21 23:08:25,826 INFO L226 Difference]: Without dead ends: 46 [2020-07-21 23:08:25,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:08:25,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-21 23:08:25,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2020-07-21 23:08:25,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 23:08:25,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-21 23:08:25,907 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 16 [2020-07-21 23:08:25,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:25,908 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-21 23:08:25,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:08:25,909 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-21 23:08:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 23:08:25,911 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:25,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:08:26,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:26,126 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:26,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:26,127 INFO L82 PathProgramCache]: Analyzing trace with hash 204295910, now seen corresponding path program 1 times [2020-07-21 23:08:26,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:26,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594667218] [2020-07-21 23:08:26,129 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 [2020-07-21 23:08:26,188 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:08:26,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:26,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 23:08:26,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:26,227 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:08:26,232 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:08:26,299 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2020-07-21 23:08:26,300 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 23:08:26,306 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2020-07-21 23:08:26,307 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 23:08:26,324 INFO L624 ElimStorePlain]: treesize reduction 16, result has 23.8 percent of original size [2020-07-21 23:08:26,325 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 23:08:26,325 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:78, output treesize:5 [2020-07-21 23:08:26,360 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:08:26,361 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:08:26,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 23:08:26,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:08:26,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594667218] [2020-07-21 23:08:26,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:08:26,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 23:08:26,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065254954] [2020-07-21 23:08:26,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:08:26,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:26,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:08:26,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:08:26,393 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 8 states. [2020-07-21 23:08:26,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:26,518 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-07-21 23:08:26,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:08:26,519 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-07-21 23:08:26,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:26,520 INFO L225 Difference]: With dead ends: 42 [2020-07-21 23:08:26,521 INFO L226 Difference]: Without dead ends: 40 [2020-07-21 23:08:26,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-21 23:08:26,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-21 23:08:26,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-21 23:08:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 23:08:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-07-21 23:08:26,531 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 18 [2020-07-21 23:08:26,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:26,531 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-07-21 23:08:26,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:08:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-07-21 23:08:26,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 23:08:26,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:26,533 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, 1, 1, 1] [2020-07-21 23:08:26,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:26,737 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:26,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1004823058, now seen corresponding path program 1 times [2020-07-21 23:08:26,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:26,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062541796] [2020-07-21 23:08:26,740 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 [2020-07-21 23:08:26,815 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:08:26,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:26,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 23:08:26,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:26,879 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2020-07-21 23:08:26,880 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 23:08:26,883 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 23:08:26,884 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 23:08:26,884 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:6 [2020-07-21 23:08:26,922 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:08:26,924 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:08:26,926 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:08:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 23:08:26,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:08:26,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:26,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:26,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:26,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:27,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:27,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:27,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:27,098 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 23:08:27,098 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2020-07-21 23:08:27,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:27,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:27,105 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 23:08:27,107 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 23:08:27,108 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 23:08:27,109 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:7 [2020-07-21 23:08:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 23:08:27,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062541796] [2020-07-21 23:08:27,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:08:27,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-07-21 23:08:27,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817116649] [2020-07-21 23:08:27,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 23:08:27,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:27,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 23:08:27,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-07-21 23:08:27,122 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 13 states. [2020-07-21 23:08:27,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:27,383 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2020-07-21 23:08:27,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 23:08:27,384 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-07-21 23:08:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:27,385 INFO L225 Difference]: With dead ends: 77 [2020-07-21 23:08:27,386 INFO L226 Difference]: Without dead ends: 75 [2020-07-21 23:08:27,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-07-21 23:08:27,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-21 23:08:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2020-07-21 23:08:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-21 23:08:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-07-21 23:08:27,398 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 23 [2020-07-21 23:08:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:27,398 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-07-21 23:08:27,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 23:08:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-07-21 23:08:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 23:08:27,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:27,400 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:08:27,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:27,616 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:27,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:27,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1563133066, now seen corresponding path program 1 times [2020-07-21 23:08:27,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:27,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637134572] [2020-07-21 23:08:27,617 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 [2020-07-21 23:08:27,668 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:08:27,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:27,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:08:27,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 23:08:27,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:08:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 23:08:27,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637134572] [2020-07-21 23:08:27,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:08:27,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 23:08:27,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102175485] [2020-07-21 23:08:27,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 23:08:27,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:27,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 23:08:27,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:08:27,765 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 9 states. [2020-07-21 23:08:27,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:27,930 INFO L93 Difference]: Finished difference Result 153 states and 189 transitions. [2020-07-21 23:08:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:08:27,931 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 23:08:27,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:27,935 INFO L225 Difference]: With dead ends: 153 [2020-07-21 23:08:27,935 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 23:08:27,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:08:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 23:08:27,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 77. [2020-07-21 23:08:27,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 23:08:27,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-07-21 23:08:27,950 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 26 [2020-07-21 23:08:27,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:27,950 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-07-21 23:08:27,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 23:08:27,951 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-07-21 23:08:27,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 23:08:27,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:27,953 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:08:28,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:28,168 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:28,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:28,169 INFO L82 PathProgramCache]: Analyzing trace with hash -411426635, now seen corresponding path program 1 times [2020-07-21 23:08:28,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:28,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442068106] [2020-07-21 23:08:28,171 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 [2020-07-21 23:08:28,224 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:08:28,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:28,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 23:08:28,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:28,344 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-07-21 23:08:28,345 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 23:08:28,348 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 23:08:28,348 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 23:08:28,348 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2020-07-21 23:08:28,367 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:08:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 23:08:28,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:08:28,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:28,609 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 3, 2, 2, 1] term [2020-07-21 23:08:28,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:28,611 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 23:08:28,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:28,612 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 23:08:28,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:28,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442068106] [2020-07-21 23:08:28,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 23:08:28,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-21 23:08:28,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719194319] [2020-07-21 23:08:28,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 23:08:28,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:28,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 23:08:28,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-07-21 23:08:28,678 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 11 states. [2020-07-21 23:08:28,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:28,960 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2020-07-21 23:08:28,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 23:08:28,963 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-07-21 23:08:28,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:28,964 INFO L225 Difference]: With dead ends: 102 [2020-07-21 23:08:28,964 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 23:08:28,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-07-21 23:08:28,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 23:08:28,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2020-07-21 23:08:28,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-21 23:08:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2020-07-21 23:08:28,989 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 33 [2020-07-21 23:08:28,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:28,993 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2020-07-21 23:08:28,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 23:08:28,993 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2020-07-21 23:08:28,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 23:08:28,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:28,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:08:29,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:29,210 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:29,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:29,210 INFO L82 PathProgramCache]: Analyzing trace with hash 556376263, now seen corresponding path program 2 times [2020-07-21 23:08:29,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:29,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771570634] [2020-07-21 23:08:29,212 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:29,263 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:08:29,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:29,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 23:08:29,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:29,328 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2020-07-21 23:08:29,329 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 23:08:29,332 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 23:08:29,332 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 23:08:29,333 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:6 [2020-07-21 23:08:29,343 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:08:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 23:08:29,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:08:29,405 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 23:08:29,406 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2020-07-21 23:08:29,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:29,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:29,411 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 23:08:29,413 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 23:08:29,413 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 23:08:29,414 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:7 [2020-07-21 23:08:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 23:08:29,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771570634] [2020-07-21 23:08:29,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:08:29,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 23:08:29,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099544071] [2020-07-21 23:08:29,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 23:08:29,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:29,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 23:08:29,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:08:29,424 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand 9 states. [2020-07-21 23:08:29,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:29,580 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2020-07-21 23:08:29,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:08:29,580 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-21 23:08:29,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:29,582 INFO L225 Difference]: With dead ends: 91 [2020-07-21 23:08:29,582 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 23:08:29,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-07-21 23:08:29,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 23:08:29,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2020-07-21 23:08:29,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-21 23:08:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2020-07-21 23:08:29,591 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 31 [2020-07-21 23:08:29,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:29,592 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2020-07-21 23:08:29,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 23:08:29,592 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2020-07-21 23:08:29,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 23:08:29,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:29,594 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:08:29,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:29,808 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:29,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:29,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1477444694, now seen corresponding path program 1 times [2020-07-21 23:08:29,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:29,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451734716] [2020-07-21 23:08:29,811 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:29,859 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:08:29,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:29,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 23:08:29,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:29,871 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:08:29,872 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 23:08:29,875 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-21 23:08:29,883 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 21 [2020-07-21 23:08:29,884 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 23:08:29,888 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 18 [2020-07-21 23:08:29,889 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 23:08:29,892 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 14 [2020-07-21 23:08:29,893 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 23:08:29,905 INFO L624 ElimStorePlain]: treesize reduction 34, result has 15.0 percent of original size [2020-07-21 23:08:29,905 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 23:08:29,905 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:134, output treesize:6 [2020-07-21 23:08:29,927 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:08:29,928 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:08:29,929 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:08:29,934 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:08:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 23:08:29,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:08:29,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451734716] [2020-07-21 23:08:29,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:08:29,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 23:08:29,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255987204] [2020-07-21 23:08:29,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:08:29,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:29,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:08:29,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:08:29,963 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand 8 states. [2020-07-21 23:08:30,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:30,044 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2020-07-21 23:08:30,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:08:30,045 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-07-21 23:08:30,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:30,045 INFO L225 Difference]: With dead ends: 68 [2020-07-21 23:08:30,046 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 23:08:30,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-21 23:08:30,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 23:08:30,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 23:08:30,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 23:08:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 23:08:30,048 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-07-21 23:08:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:30,048 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 23:08:30,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:08:30,048 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 23:08:30,048 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 23:08:30,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:30,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 23:08:30,423 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 23:08:30,423 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 23:08:30,423 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:08:30,423 INFO L271 CegarLoopResult]: At program point printOddENTRY(lines 7 9) the Hoare annotation is: true [2020-07-21 23:08:30,424 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (or (= 0 (mod |printOdd_#in~i| 2)) (not (= 0 (mod printOdd_~i 2)))) [2020-07-21 23:08:30,424 INFO L268 CegarLoopResult]: For program point printOddFINAL(lines 7 9) no Hoare annotation was computed. [2020-07-21 23:08:30,424 INFO L268 CegarLoopResult]: For program point printOddEXIT(lines 7 9) no Hoare annotation was computed. [2020-07-21 23:08:30,424 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:08:30,424 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 23:08:30,424 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 23:08:30,424 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 23:08:30,424 INFO L268 CegarLoopResult]: For program point printEvenEXIT(lines 4 6) no Hoare annotation was computed. [2020-07-21 23:08:30,424 INFO L271 CegarLoopResult]: At program point printEvenENTRY(lines 4 6) the Hoare annotation is: true [2020-07-21 23:08:30,424 INFO L268 CegarLoopResult]: For program point printEvenFINAL(lines 4 6) no Hoare annotation was computed. [2020-07-21 23:08:30,425 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (or (not (= 0 (mod |printEven_#in~i| 2))) (= printEven_~i |printEven_#in~i|)) [2020-07-21 23:08:30,425 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 36) no Hoare annotation was computed. [2020-07-21 23:08:30,425 INFO L268 CegarLoopResult]: For program point L23(lines 23 26) no Hoare annotation was computed. [2020-07-21 23:08:30,425 INFO L264 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: (not (= 0 (mod |main_#t~mem8| 2))) [2020-07-21 23:08:30,425 INFO L268 CegarLoopResult]: For program point L32-1(line 32) no Hoare annotation was computed. [2020-07-21 23:08:30,425 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 34) no Hoare annotation was computed. [2020-07-21 23:08:30,425 INFO L271 CegarLoopResult]: At program point L28-3(lines 28 34) the Hoare annotation is: true [2020-07-21 23:08:30,425 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 34) no Hoare annotation was computed. [2020-07-21 23:08:30,426 INFO L268 CegarLoopResult]: For program point L16-2(lines 16 19) no Hoare annotation was computed. [2020-07-21 23:08:30,426 INFO L271 CegarLoopResult]: At program point L16-3(lines 16 19) the Hoare annotation is: true [2020-07-21 23:08:30,426 INFO L268 CegarLoopResult]: For program point L16-4(lines 16 19) no Hoare annotation was computed. [2020-07-21 23:08:30,426 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (= 0 (mod |main_#t~mem5| 2)) [2020-07-21 23:08:30,426 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-07-21 23:08:30,426 INFO L268 CegarLoopResult]: For program point L21-2(lines 21 27) no Hoare annotation was computed. [2020-07-21 23:08:30,426 INFO L271 CegarLoopResult]: At program point L21-3(lines 21 27) the Hoare annotation is: true [2020-07-21 23:08:30,426 INFO L268 CegarLoopResult]: For program point L21-4(lines 21 27) no Hoare annotation was computed. [2020-07-21 23:08:30,426 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 36) no Hoare annotation was computed. [2020-07-21 23:08:30,426 INFO L268 CegarLoopResult]: For program point L30(lines 30 33) no Hoare annotation was computed. [2020-07-21 23:08:30,426 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 36) the Hoare annotation is: true [2020-07-21 23:08:30,427 INFO L268 CegarLoopResult]: For program point L3-3(line 3) no Hoare annotation was computed. [2020-07-21 23:08:30,427 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 3) the Hoare annotation is: true [2020-07-21 23:08:30,427 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 3) no Hoare annotation was computed. [2020-07-21 23:08:30,427 INFO L268 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-07-21 23:08:30,427 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-07-21 23:08:30,427 INFO L268 CegarLoopResult]: For program point L3-1(line 3) no Hoare annotation was computed. [2020-07-21 23:08:30,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:08:30 BoogieIcfgContainer [2020-07-21 23:08:30,437 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:08:30,439 INFO L168 Benchmark]: Toolchain (without parser) took 5875.40 ms. Allocated memory was 144.7 MB in the beginning and 247.5 MB in the end (delta: 102.8 MB). Free memory was 102.5 MB in the beginning and 152.9 MB in the end (delta: -50.3 MB). Peak memory consumption was 52.4 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:30,439 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 23:08:30,440 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.85 ms. Allocated memory is still 144.7 MB. Free memory was 102.1 MB in the beginning and 91.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:30,441 INFO L168 Benchmark]: Boogie Preprocessor took 124.93 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 91.7 MB in the beginning and 179.0 MB in the end (delta: -87.3 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:30,442 INFO L168 Benchmark]: RCFGBuilder took 418.29 ms. Allocated memory is still 201.3 MB. Free memory was 179.0 MB in the beginning and 161.9 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:30,442 INFO L168 Benchmark]: TraceAbstraction took 5071.01 ms. Allocated memory was 201.3 MB in the beginning and 247.5 MB in the end (delta: 46.1 MB). Free memory was 161.2 MB in the beginning and 152.9 MB in the end (delta: 8.3 MB). Peak memory consumption was 54.5 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:30,445 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.85 ms. Allocated memory is still 144.7 MB. Free memory was 102.1 MB in the beginning and 91.7 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.93 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 91.7 MB in the beginning and 179.0 MB in the end (delta: -87.3 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 418.29 ms. Allocated memory is still 201.3 MB. Free memory was 179.0 MB in the beginning and 161.9 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5071.01 ms. Allocated memory was 201.3 MB in the beginning and 247.5 MB in the end (delta: 46.1 MB). Free memory was 161.2 MB in the beginning and 152.9 MB in the end (delta: 8.3 MB). Peak memory consumption was 54.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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: 21]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.8s, OverallIterations: 7, TraceHistogramMax: 2, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 244 SDtfs, 219 SDslu, 1166 SDs, 0 SdLazy, 696 SolverSat, 101 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 297 GetRequests, 214 SyntacticMatches, 10 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 63 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 51 PreInvPairs, 76 NumberOfFragments, 43 HoareAnnotationTreeSize, 51 FomulaSimplifications, 204 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 14 FomulaSimplificationsInter, 18 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 188 NumberOfCodeBlocks, 166 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 258 ConstructedInterpolants, 0 QuantifiedInterpolants, 21978 SizeOfPredicates, 51 NumberOfNonLiveVariables, 579 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 42/52 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...