/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:19:49,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:19:49,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:19:49,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:19:49,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:19:49,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:19:49,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:19:49,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:19:49,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:19:49,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:19:49,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:19:49,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:19:49,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:19:49,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:19:49,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:19:49,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:19:49,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:19:49,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:19:49,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:19:49,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:19:49,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:19:49,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:19:49,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:19:49,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:19:49,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:19:49,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:19:49,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:19:49,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:19:49,491 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 16:19:49,506 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:19:49,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:19:49,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:19:49,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:19:49,508 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:19:49,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:19:49,508 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:19:49,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:19:49,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:19:49,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:19:49,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:19:49,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:19:49,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:19:49,509 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:19:49,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:19:49,510 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:19:49,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:19:49,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:19:49,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:19:49,511 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:19:49,511 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:19:49,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:19:49,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:19:49,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:19:49,512 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:19:49,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:19:49,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:19:49,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:19:49,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:19:49,512 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 -> 2 [2020-07-21 16:19:49,798 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:19:49,813 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:19:49,818 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:19:49,820 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:19:49,820 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:19:49,822 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-1.c [2020-07-21 16:19:49,898 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8bbbf939/6bed8f5ee4e84413b1e1b287355898f6/FLAG13c99c791 [2020-07-21 16:19:50,408 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:19:50,409 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-1.c [2020-07-21 16:19:50,417 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8bbbf939/6bed8f5ee4e84413b1e1b287355898f6/FLAG13c99c791 [2020-07-21 16:19:50,765 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8bbbf939/6bed8f5ee4e84413b1e1b287355898f6 [2020-07-21 16:19:50,776 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:19:50,779 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:19:50,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:19:50,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:19:50,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:19:50,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:19:50" (1/1) ... [2020-07-21 16:19:50,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@438f8111 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:50, skipping insertion in model container [2020-07-21 16:19:50,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:19:50" (1/1) ... [2020-07-21 16:19:50,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:19:50,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:19:51,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:19:51,028 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:19:51,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:19:51,165 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:19:51,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:51 WrapperNode [2020-07-21 16:19:51,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:19:51,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:19:51,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:19:51,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:19:51,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:51" (1/1) ... [2020-07-21 16:19:51,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:51" (1/1) ... [2020-07-21 16:19:51,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:51" (1/1) ... [2020-07-21 16:19:51,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:51" (1/1) ... [2020-07-21 16:19:51,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:51" (1/1) ... [2020-07-21 16:19:51,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:51" (1/1) ... [2020-07-21 16:19:51,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:51" (1/1) ... [2020-07-21 16:19:51,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:19:51,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:19:51,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:19:51,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:19:51,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:51" (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 16:19:51,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:19:51,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:19:51,322 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-21 16:19:51,323 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:19:51,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:19:51,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:19:51,325 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 16:19:51,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:19:51,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:19:51,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 16:19:51,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:19:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:19:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:19:51,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:19:51,599 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:19:51,599 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 16:19:51,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:19:51 BoogieIcfgContainer [2020-07-21 16:19:51,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:19:51,612 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:19:51,612 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:19:51,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:19:51,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:19:50" (1/3) ... [2020-07-21 16:19:51,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491e0342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:19:51, skipping insertion in model container [2020-07-21 16:19:51,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:19:51" (2/3) ... [2020-07-21 16:19:51,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491e0342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:19:51, skipping insertion in model container [2020-07-21 16:19:51,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:19:51" (3/3) ... [2020-07-21 16:19:51,633 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-1.c [2020-07-21 16:19:51,657 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:19:51,665 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:19:51,679 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:19:51,708 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:19:51,708 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:19:51,708 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:19:51,709 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:19:51,709 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:19:51,709 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:19:51,709 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:19:51,709 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:19:51,725 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-21 16:19:51,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 16:19:51,730 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:19:51,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:19:51,731 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:19:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:19:51,738 INFO L82 PathProgramCache]: Analyzing trace with hash 149844724, now seen corresponding path program 1 times [2020-07-21 16:19:51,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:19:51,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127573401] [2020-07-21 16:19:51,748 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 16:19:51,874 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:19:51,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:19:51,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 16:19:51,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:19:51,904 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 16:19:51,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:19:51,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127573401] [2020-07-21 16:19:51,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:19:51,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 16:19:51,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192620190] [2020-07-21 16:19:51,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 16:19:51,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:19:51,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 16:19:51,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:19:51,930 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-07-21 16:19:51,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:19:51,952 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-07-21 16:19:51,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 16:19:51,954 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-07-21 16:19:51,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:19:51,964 INFO L225 Difference]: With dead ends: 35 [2020-07-21 16:19:51,964 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 16:19:51,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:19:51,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 16:19:52,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 16:19:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 16:19:52,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-21 16:19:52,008 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-07-21 16:19:52,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:19:52,009 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-21 16:19:52,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 16:19:52,009 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-21 16:19:52,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 16:19:52,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:19:52,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:19:52,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:19:52,225 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:19:52,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:19:52,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1249419983, now seen corresponding path program 1 times [2020-07-21 16:19:52,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:19:52,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051905009] [2020-07-21 16:19:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 16:19:52,317 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:19:52,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:19:52,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:19:52,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:19:52,418 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2020-07-21 16:19:52,418 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:19:52,441 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:19:52,444 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:19:52,444 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:52 [2020-07-21 16:19:52,486 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 16:19:52,490 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:19:52,491 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 50 treesize of output 21 [2020-07-21 16:19:52,494 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:19:52,510 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:19:52,514 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-21 16:19:52,515 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:30 [2020-07-21 16:19:52,569 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 16:19:52,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:19:52,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051905009] [2020-07-21 16:19:52,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:19:52,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:19:52,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919260973] [2020-07-21 16:19:52,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:19:52,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:19:52,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:19:52,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:19:52,577 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 4 states. [2020-07-21 16:19:52,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:19:52,659 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-07-21 16:19:52,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:19:52,662 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-21 16:19:52,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:19:52,663 INFO L225 Difference]: With dead ends: 27 [2020-07-21 16:19:52,663 INFO L226 Difference]: Without dead ends: 19 [2020-07-21 16:19:52,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:19:52,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-21 16:19:52,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-21 16:19:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-21 16:19:52,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-07-21 16:19:52,676 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-07-21 16:19:52,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:19:52,677 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-07-21 16:19:52,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:19:52,677 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-07-21 16:19:52,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 16:19:52,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:19:52,681 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:19:52,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:19:52,893 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:19:52,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:19:52,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1840889772, now seen corresponding path program 1 times [2020-07-21 16:19:52,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:19:52,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389095533] [2020-07-21 16:19:52,896 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 16:19:52,972 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:19:52,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:19:52,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 16:19:52,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:19:53,001 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2020-07-21 16:19:53,002 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:19:53,016 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:19:53,018 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-07-21 16:19:53,018 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:52 [2020-07-21 16:19:53,064 INFO L173 IndexEqualityManager]: detected equality via solver [2020-07-21 16:19:53,067 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:19:53,068 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 50 treesize of output 21 [2020-07-21 16:19:53,070 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:19:53,082 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:19:53,084 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-21 16:19:53,084 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:30 [2020-07-21 16:19:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:19:53,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:19:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:19:53,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389095533] [2020-07-21 16:19:53,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:19:53,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 16:19:53,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546497601] [2020-07-21 16:19:53,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 16:19:53,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:19:53,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 16:19:53,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-21 16:19:53,222 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 8 states. [2020-07-21 16:19:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:19:53,375 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-07-21 16:19:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:19:53,375 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-07-21 16:19:53,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:19:53,376 INFO L225 Difference]: With dead ends: 33 [2020-07-21 16:19:53,376 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 16:19:53,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:19:53,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 16:19:53,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-21 16:19:53,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 16:19:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-07-21 16:19:53,384 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 18 [2020-07-21 16:19:53,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:19:53,384 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-07-21 16:19:53,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 16:19:53,384 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-07-21 16:19:53,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 16:19:53,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:19:53,385 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:19:53,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:19:53,594 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:19:53,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:19:53,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1976792733, now seen corresponding path program 2 times [2020-07-21 16:19:53,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:19:53,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855947801] [2020-07-21 16:19:53,597 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 16:19:53,661 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:19:53,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:19:53,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 16:19:53,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:19:53,689 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2020-07-21 16:19:53,690 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:19:53,705 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:19:53,706 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:19:53,706 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2020-07-21 16:19:55,894 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#ad1~0.base_BEFORE_CALL_1| Int) (|v_main_~#ad1~0.offset_BEFORE_CALL_1| Int) (main_~pa~0.offset Int)) (and (= 0 (mod (+ (* |v_main_~#ad1~0.offset_BEFORE_CALL_1| 7) main_~pa~0.offset) 8)) (let ((.cse0 (div (+ (* |v_main_~#ad1~0.offset_BEFORE_CALL_1| (- 1)) main_~pa~0.offset) 8))) (= .cse0 (select (select |c_#memory_int| |v_main_~#ad1~0.base_BEFORE_CALL_1|) (+ |v_main_~#ad1~0.offset_BEFORE_CALL_1| (* .cse0 8))))))) is different from true [2020-07-21 16:20:08,123 WARN L193 SmtUtils]: Spent 12.18 s on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2020-07-21 16:20:14,260 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 16:20:14,268 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:20:14,277 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:20:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 16:20:14,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:20:14,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:20:14,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:20:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 16:20:14,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855947801] [2020-07-21 16:20:14,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:20:14,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2020-07-21 16:20:14,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675260995] [2020-07-21 16:20:14,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 16:20:14,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:20:14,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 16:20:14,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=194, Unknown=2, NotChecked=28, Total=272 [2020-07-21 16:20:14,803 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2020-07-21 16:20:15,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:20:15,201 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-07-21 16:20:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 16:20:15,202 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2020-07-21 16:20:15,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:20:15,202 INFO L225 Difference]: With dead ends: 25 [2020-07-21 16:20:15,203 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 16:20:15,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=78, Invalid=266, Unknown=2, NotChecked=34, Total=380 [2020-07-21 16:20:15,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 16:20:15,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 16:20:15,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 16:20:15,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 16:20:15,205 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2020-07-21 16:20:15,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:20:15,205 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 16:20:15,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 16:20:15,205 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 16:20:15,205 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 16:20:15,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:20:15,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 16:20:17,563 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 27 DAG size of output: 1 [2020-07-21 16:20:17,568 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-21 16:20:17,568 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-21 16:20:17,568 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:20:17,569 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 16:20:17,569 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 16:20:17,569 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 16:20:17,569 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 16:20:17,569 INFO L268 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-07-21 16:20:17,569 INFO L268 CegarLoopResult]: For program point L29-1(lines 29 31) no Hoare annotation was computed. [2020-07-21 16:20:17,570 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 38) no Hoare annotation was computed. [2020-07-21 16:20:17,570 INFO L268 CegarLoopResult]: For program point L21(lines 21 32) no Hoare annotation was computed. [2020-07-21 16:20:17,570 INFO L268 CegarLoopResult]: For program point L21-2(lines 21 32) no Hoare annotation was computed. [2020-07-21 16:20:17,570 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 38) no Hoare annotation was computed. [2020-07-21 16:20:17,570 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 36) no Hoare annotation was computed. [2020-07-21 16:20:17,570 INFO L264 CegarLoopResult]: At program point L30(lines 15 38) the Hoare annotation is: false [2020-07-21 16:20:17,571 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 38) the Hoare annotation is: true [2020-07-21 16:20:17,571 INFO L268 CegarLoopResult]: For program point L26-1(lines 26 28) no Hoare annotation was computed. [2020-07-21 16:20:17,571 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 28) the Hoare annotation is: (and (= 0 (mod (+ main_~pa~0.offset (* |main_~#ad1~0.offset| 7)) 8)) (let ((.cse0 (div (+ main_~pa~0.offset (* |main_~#ad1~0.offset| (- 1))) 8))) (= (select (select |#memory_int| |main_~#ad1~0.base|) (+ (* .cse0 8) |main_~#ad1~0.offset|)) .cse0)) (<= main_~i~0 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset)) (= main_~pa~0.base |main_~#ad1~0.base|)) [2020-07-21 16:20:17,571 INFO L264 CegarLoopResult]: At program point L26-4(lines 26 28) the Hoare annotation is: (and (let ((.cse0 (div (+ main_~pa~0.offset (* |main_~#ad1~0.offset| (- 1))) 8))) (= (select (select |#memory_int| |main_~#ad1~0.base|) (+ (* .cse0 8) |main_~#ad1~0.offset|)) .cse0)) (= 0 (mod (+ main_~pa~0.offset (* |main_~#ad1~0.offset| 7)) 8)) (<= main_~i~0 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset)) (= main_~pa~0.base |main_~#ad1~0.base|) (exists ((main_~pa~0.offset Int)) (let ((.cse1 (select |#memory_int| |main_~#ad1~0.base|))) (let ((.cse3 (select .cse1 main_~pa~0.offset))) (and (let ((.cse2 (div (+ main_~pa~0.offset (* |main_~#ad1~0.offset| (- 1))) 8))) (= (select .cse1 (+ (* .cse2 8) |main_~#ad1~0.offset|)) .cse2)) (= 0 (mod (+ main_~pa~0.offset (* |main_~#ad1~0.offset| 7)) 8)) (<= main_~i~0 .cse3) (<= .cse3 main_~i~0)))))) [2020-07-21 16:20:17,572 INFO L271 CegarLoopResult]: At program point checkENTRY(lines 9 12) the Hoare annotation is: true [2020-07-21 16:20:17,572 INFO L268 CegarLoopResult]: For program point checkFINAL(lines 9 12) no Hoare annotation was computed. [2020-07-21 16:20:17,572 INFO L268 CegarLoopResult]: For program point checkEXIT(lines 9 12) no Hoare annotation was computed. [2020-07-21 16:20:17,581 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 16:20:17,582 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 16:20:17,589 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 16:20:17,589 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 16:20:17,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:20:17 BoogieIcfgContainer [2020-07-21 16:20:17,592 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:20:17,594 INFO L168 Benchmark]: Toolchain (without parser) took 26816.50 ms. Allocated memory was 145.8 MB in the beginning and 246.4 MB in the end (delta: 100.7 MB). Free memory was 103.2 MB in the beginning and 210.7 MB in the end (delta: -107.5 MB). Peak memory consumption was 111.2 MB. Max. memory is 7.1 GB. [2020-07-21 16:20:17,595 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 145.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 16:20:17,596 INFO L168 Benchmark]: CACSL2BoogieTranslator took 385.60 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 102.8 MB in the beginning and 182.6 MB in the end (delta: -79.8 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2020-07-21 16:20:17,597 INFO L168 Benchmark]: Boogie Preprocessor took 63.78 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 180.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:20:17,598 INFO L168 Benchmark]: RCFGBuilder took 379.38 ms. Allocated memory is still 203.4 MB. Free memory was 180.2 MB in the beginning and 165.7 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:20:17,599 INFO L168 Benchmark]: TraceAbstraction took 25980.21 ms. Allocated memory was 203.4 MB in the beginning and 246.4 MB in the end (delta: 43.0 MB). Free memory was 165.1 MB in the beginning and 210.7 MB in the end (delta: -45.7 MB). Peak memory consumption was 115.4 MB. Max. memory is 7.1 GB. [2020-07-21 16:20:17,603 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 145.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 385.60 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 102.8 MB in the beginning and 182.6 MB in the end (delta: -79.8 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 63.78 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 180.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 379.38 ms. Allocated memory is still 203.4 MB. Free memory was 180.2 MB in the beginning and 165.7 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 25980.21 ms. Allocated memory was 203.4 MB in the beginning and 246.4 MB in the end (delta: 43.0 MB). Free memory was 165.1 MB in the beginning and 210.7 MB in the end (delta: -45.7 MB). Peak memory consumption was 115.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 36]: 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: 26]: Loop Invariant [2020-07-21 16:20:17,616 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 16:20:17,616 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 16:20:17,617 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-07-21 16:20:17,617 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((0 == (pa + ad1 * 7) % 8 && unknown-#memory_int-unknown[ad1][(pa + ad1 * -1) / 8 * 8 + ad1] == (pa + ad1 * -1) / 8) && i <= unknown-#memory_int-unknown[pa][pa]) && pa == ad1 - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 23.7s, OverallIterations: 4, TraceHistogramMax: 5, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 62 SDtfs, 9 SDslu, 114 SDs, 0 SdLazy, 78 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 119 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 21.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 11 PreInvPairs, 16 NumberOfFragments, 140 HoareAnnotationTreeSize, 11 FomulaSimplifications, 290 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 70 FormulaSimplificationTreeSizeReductionInter, 2.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 21.6s InterpolantComputationTime, 73 NumberOfCodeBlocks, 56 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 109 ConstructedInterpolants, 19 QuantifiedInterpolants, 27672 SizeOfPredicates, 34 NumberOfNonLiveVariables, 289 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 25/44 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...