/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/nla-digbench/geo2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:17:15,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:17:15,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:17:15,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:17:15,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:17:15,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:17:15,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:17:15,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:17:15,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:17:15,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:17:15,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:17:15,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:17:15,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:17:15,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:17:15,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:17:15,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:17:15,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:17:15,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:17:15,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:17:15,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:17:15,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:17:15,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:17:15,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:17:15,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:17:15,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 17:17:15,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:17:15,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:17:15,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:17:15,630 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 17:17:15,645 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:17:15,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:17:15,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:17:15,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:17:15,647 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:17:15,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:17:15,647 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:17:15,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:17:15,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:17:15,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:17:15,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:17:15,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:17:15,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:17:15,649 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:17:15,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:17:15,649 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:17:15,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:17:15,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:17:15,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:17:15,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:17:15,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:17:15,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:17:15,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:17:15,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:17:15,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:17:15,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:17:15,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:17:15,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:17:15,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:17:15,652 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 17:17:15,959 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:17:15,972 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:17:15,976 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:17:15,977 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:17:15,977 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:17:15,978 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo2.c [2020-07-21 17:17:16,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623bdc274/a79dfdec4e7745cda0d08e04b2d2890c/FLAG7c40865f2 [2020-07-21 17:17:16,555 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:17:16,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo2.c [2020-07-21 17:17:16,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623bdc274/a79dfdec4e7745cda0d08e04b2d2890c/FLAG7c40865f2 [2020-07-21 17:17:16,965 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/623bdc274/a79dfdec4e7745cda0d08e04b2d2890c [2020-07-21 17:17:16,974 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:17:16,978 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:17:16,979 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:17:16,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:17:16,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:17:16,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:17:16" (1/1) ... [2020-07-21 17:17:16,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cf42421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:17:16, skipping insertion in model container [2020-07-21 17:17:16,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:17:16" (1/1) ... [2020-07-21 17:17:16,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:17:17,013 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:17:17,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:17:17,185 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:17:17,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:17:17,212 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:17:17,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:17:17 WrapperNode [2020-07-21 17:17:17,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:17:17,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:17:17,213 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:17:17,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:17:17,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:17:17" (1/1) ... [2020-07-21 17:17:17,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:17:17" (1/1) ... [2020-07-21 17:17:17,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:17:17" (1/1) ... [2020-07-21 17:17:17,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:17:17" (1/1) ... [2020-07-21 17:17:17,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:17:17" (1/1) ... [2020-07-21 17:17:17,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:17:17" (1/1) ... [2020-07-21 17:17:17,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:17:17" (1/1) ... [2020-07-21 17:17:17,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:17:17,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:17:17,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:17:17,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:17:17,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:17:17" (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 17:17:17,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:17:17,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:17:17,381 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 17:17:17,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 17:17:17,381 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:17:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:17:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 17:17:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 17:17:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 17:17:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 17:17:17,382 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:17:17,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:17:17,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:17:17,577 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:17:17,577 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 17:17:17,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:17:17 BoogieIcfgContainer [2020-07-21 17:17:17,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:17:17,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:17:17,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:17:17,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:17:17,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:17:16" (1/3) ... [2020-07-21 17:17:17,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d765a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:17:17, skipping insertion in model container [2020-07-21 17:17:17,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:17:17" (2/3) ... [2020-07-21 17:17:17,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d765a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:17:17, skipping insertion in model container [2020-07-21 17:17:17,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:17:17" (3/3) ... [2020-07-21 17:17:17,589 INFO L109 eAbstractionObserver]: Analyzing ICFG geo2.c [2020-07-21 17:17:17,599 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:17:17,606 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 17:17:17,620 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 17:17:17,642 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:17:17,642 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:17:17,642 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:17:17,642 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:17:17,642 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:17:17,643 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:17:17,643 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:17:17,643 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:17:17,659 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 17:17:17,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 17:17:17,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:17:17,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:17:17,665 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:17:17,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:17:17,670 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-21 17:17:17,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:17:17,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763286545] [2020-07-21 17:17:17,677 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 17:17:17,744 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:17:17,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:17:17,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 17:17:17,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:17:17,784 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 17:17:17,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:17:17,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763286545] [2020-07-21 17:17:17,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:17:17,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 17:17:17,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568784777] [2020-07-21 17:17:17,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 17:17:17,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:17:17,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 17:17:17,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 17:17:17,818 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-21 17:17:17,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:17:17,845 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-21 17:17:17,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 17:17:17,846 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-21 17:17:17,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:17:17,856 INFO L225 Difference]: With dead ends: 35 [2020-07-21 17:17:17,856 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 17:17:17,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 17:17:17,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 17:17:17,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 17:17:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 17:17:17,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 17:17:17,903 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-21 17:17:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:17:17,904 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 17:17:17,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 17:17:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 17:17:17,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 17:17:17,905 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:17:17,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:17:18,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:17:18,120 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:17:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:17:18,122 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-21 17:17:18,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:17:18,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674678294] [2020-07-21 17:17:18,123 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 17:17:18,169 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:17:18,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:17:18,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 17:17:18,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:17:18,247 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 17:17:18,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:17:18,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674678294] [2020-07-21 17:17:18,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:17:18,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:17:18,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098612662] [2020-07-21 17:17:18,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:17:18,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:17:18,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:17:18,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:17:18,252 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-21 17:17:18,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:17:18,322 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-21 17:17:18,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:17:18,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 17:17:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:17:18,324 INFO L225 Difference]: With dead ends: 25 [2020-07-21 17:17:18,324 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 17:17:18,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:17:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 17:17:18,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-21 17:17:18,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 17:17:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-21 17:17:18,334 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-21 17:17:18,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:17:18,335 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-21 17:17:18,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:17:18,335 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-21 17:17:18,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 17:17:18,336 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:17:18,337 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:17:18,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:17:18,551 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:17:18,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:17:18,553 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-21 17:17:18,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:17:18,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435887146] [2020-07-21 17:17:18,554 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 17:17:18,604 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:17:18,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:17:18,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 17:17:18,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:17:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:17:18,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:17:18,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:17:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:17:22,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435887146] [2020-07-21 17:17:22,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:17:22,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 17:17:22,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63350718] [2020-07-21 17:17:22,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 17:17:22,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:17:22,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 17:17:22,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=38, Unknown=2, NotChecked=0, Total=56 [2020-07-21 17:17:22,971 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2020-07-21 17:17:37,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:17:37,270 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-21 17:17:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 17:17:37,271 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-21 17:17:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:17:37,272 INFO L225 Difference]: With dead ends: 32 [2020-07-21 17:17:37,272 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 17:17:37,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=20, Invalid=50, Unknown=2, NotChecked=0, Total=72 [2020-07-21 17:17:37,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 17:17:37,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-07-21 17:17:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 17:17:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-07-21 17:17:37,283 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 17 [2020-07-21 17:17:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:17:37,283 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-07-21 17:17:37,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 17:17:37,284 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-07-21 17:17:37,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 17:17:37,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:17:37,285 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:17:37,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:17:37,486 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:17:37,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:17:37,487 INFO L82 PathProgramCache]: Analyzing trace with hash 325764102, now seen corresponding path program 1 times [2020-07-21 17:17:37,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:17:37,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132012517] [2020-07-21 17:17:37,489 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 17:17:37,526 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:17:37,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:17:37,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 17:17:37,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:17:37,637 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:17:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 17:17:37,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:17:37,976 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 17:17:38,212 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 17:17:38,217 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 17:17:38,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:17:38,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:17:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 17:17:38,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132012517] [2020-07-21 17:17:38,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:17:38,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-07-21 17:17:38,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581527595] [2020-07-21 17:17:38,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 17:17:38,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:17:38,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 17:17:38,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:17:38,306 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 9 states. [2020-07-21 17:17:41,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:17:41,071 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-07-21 17:17:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 17:17:41,072 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-07-21 17:17:41,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:17:41,075 INFO L225 Difference]: With dead ends: 34 [2020-07-21 17:17:41,075 INFO L226 Difference]: Without dead ends: 27 [2020-07-21 17:17:41,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-21 17:17:41,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-21 17:17:41,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-21 17:17:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 17:17:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-21 17:17:41,083 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2020-07-21 17:17:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:17:41,083 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-21 17:17:41,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 17:17:41,084 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-21 17:17:41,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 17:17:41,085 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:17:41,085 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:17:41,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:17:41,286 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:17:41,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:17:41,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-21 17:17:41,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:17:41,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045645599] [2020-07-21 17:17:41,288 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 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 17:17:41,318 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:17:41,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:17:41,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 17:17:41,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:17:47,472 WARN L193 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 17:17:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 17:17:47,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:17:47,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:18:00,737 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 17:18:00,740 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 17:18:00,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:18:02,822 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0))) (or (= (+ c_main_~z~0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0)) (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 1) (+ (* c_main_~y~0 c_main_~z~0) c_main_~x~0))))) is different from true [2020-07-21 17:18:02,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 17:18:03,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 17:18:06,281 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (or (not (= (+ (* c_main_~x~0 c_main_~z~0) (* c_main_~y~0 c_main_~z~0 c_main_~z~0)) (+ c_main_~z~0 .cse0))) (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ (* c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))))) is different from true [2020-07-21 17:18:06,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 17:18:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2020-07-21 17:18:06,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045645599] [2020-07-21 17:18:06,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:18:06,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-07-21 17:18:06,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770143754] [2020-07-21 17:18:06,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 17:18:06,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:18:06,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 17:18:06,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=120, Unknown=9, NotChecked=46, Total=210 [2020-07-21 17:18:06,317 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2020-07-21 17:18:26,053 WARN L193 SmtUtils]: Spent 12.68 s on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-07-21 17:18:36,708 WARN L193 SmtUtils]: Spent 5.33 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 17:18:52,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:18:52,127 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-07-21 17:18:52,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 17:18:52,196 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-07-21 17:18:52,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:18:52,197 INFO L225 Difference]: With dead ends: 37 [2020-07-21 17:18:52,197 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 17:18:52,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=58, Invalid=211, Unknown=11, NotChecked=62, Total=342 [2020-07-21 17:18:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 17:18:52,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-21 17:18:52,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-21 17:18:52,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-07-21 17:18:52,206 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2020-07-21 17:18:52,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:18:52,207 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-07-21 17:18:52,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 17:18:52,207 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-07-21 17:18:52,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 17:18:52,208 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:18:52,208 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:18:52,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:18:52,424 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:18:52,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:18:52,425 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-21 17:18:52,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:18:52,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994429132] [2020-07-21 17:18:52,427 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 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 17:18:52,482 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:18:52,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:18:52,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 17:18:52,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:18:55,370 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:19:01,541 WARN L838 $PredicateComparison]: unable to prove that (or (<= 1 |c___VERIFIER_assert_#in~cond|) (and (exists ((v_main_~x~0_20 Int) (v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_21 Int)) (let ((.cse0 (* v_main_~x~0_20 v_main_~z~0_BEFORE_CALL_10))) (and (= (+ .cse0 1) (+ (* v_main_~y~0_21 v_main_~z~0_BEFORE_CALL_10) v_main_~x~0_20)) (not (= (+ v_main_~z~0_BEFORE_CALL_10 (* v_main_~x~0_20 v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10)) (+ .cse0 (* v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_21))))))) (<= 0 |c___VERIFIER_assert_#in~cond|))) is different from false [2020-07-21 17:19:01,545 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:19:27,621 WARN L193 SmtUtils]: Spent 13.14 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 17:19:29,686 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:19:37,895 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_20 Int) (v_main_~y~0_21 Int) (v_main_~z~0_BEFORE_CALL_10 Int)) (let ((.cse0 (* v_main_~x~0_20 v_main_~z~0_BEFORE_CALL_10))) (and (= (+ .cse0 1) (+ (* v_main_~y~0_21 v_main_~z~0_BEFORE_CALL_10) v_main_~x~0_20)) (not (= (+ v_main_~z~0_BEFORE_CALL_10 (* v_main_~x~0_20 v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10)) (+ .cse0 (* v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_21))))))) is different from false [2020-07-21 17:19:39,921 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_20 Int) (v_main_~y~0_21 Int) (v_main_~z~0_BEFORE_CALL_10 Int)) (let ((.cse0 (* v_main_~x~0_20 v_main_~z~0_BEFORE_CALL_10))) (and (= (+ .cse0 1) (+ (* v_main_~y~0_21 v_main_~z~0_BEFORE_CALL_10) v_main_~x~0_20)) (not (= (+ v_main_~z~0_BEFORE_CALL_10 (* v_main_~x~0_20 v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10)) (+ .cse0 (* v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_21))))))) is different from true [2020-07-21 17:19:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-21 17:19:39,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:19:43,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:19:51,442 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 17:19:51,554 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 17:19:51,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:19:53,663 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~x~0 Int) (main_~y~0 Int)) (let ((.cse0 (* main_~x~0 c_main_~z~0))) (or (= (+ .cse0 (* main_~y~0 c_main_~z~0 c_main_~z~0)) (+ c_main_~z~0 (* main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 1) (+ (* main_~y~0 c_main_~z~0) main_~x~0)))))) is different from true [2020-07-21 17:19:53,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994429132] [2020-07-21 17:19:53,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 17:19:53,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-21 17:19:53,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364731731] [2020-07-21 17:19:53,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 17:19:53,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:19:53,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 17:19:53,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=86, Unknown=9, NotChecked=60, Total=182 [2020-07-21 17:19:53,666 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 10 states. [2020-07-21 17:19:54,289 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 17:20:04,788 WARN L838 $PredicateComparison]: unable to prove that (and (or (and (exists ((v_main_~x~0_20 Int) (v_main_~y~0_21 Int) (v_main_~z~0_BEFORE_CALL_10 Int)) (let ((.cse0 (* v_main_~x~0_20 v_main_~z~0_BEFORE_CALL_10))) (and (= (+ .cse0 1) (+ (* v_main_~y~0_21 v_main_~z~0_BEFORE_CALL_10) v_main_~x~0_20)) (not (= (+ v_main_~z~0_BEFORE_CALL_10 (* v_main_~x~0_20 v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10)) (+ .cse0 (* v_main_~z~0_BEFORE_CALL_10 v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_21))))))) (<= 0 c___VERIFIER_assert_~cond)) (<= 1 c___VERIFIER_assert_~cond)) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond)) is different from false [2020-07-21 17:20:15,926 WARN L193 SmtUtils]: Spent 6.19 s on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 17:20:18,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:20:18,231 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-07-21 17:20:18,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 17:20:18,236 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-21 17:20:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:20:18,237 INFO L225 Difference]: With dead ends: 34 [2020-07-21 17:20:18,237 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 17:20:18,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 56.3s TimeCoverageRelationStatistics Valid=42, Invalid=144, Unknown=12, NotChecked=108, Total=306 [2020-07-21 17:20:18,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 17:20:18,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 17:20:18,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 17:20:18,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 17:20:18,239 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-07-21 17:20:18,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:20:18,239 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 17:20:18,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 17:20:18,239 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 17:20:18,239 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 17:20:18,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:20:18,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 17:20:20,604 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2020-07-21 17:20:24,929 WARN L193 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-07-21 17:20:39,195 WARN L193 SmtUtils]: Spent 14.26 s on a formula simplification. DAG size of input: 30 DAG size of output: 1 [2020-07-21 17:20:44,070 WARN L193 SmtUtils]: Spent 4.87 s on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-07-21 17:20:44,073 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 17:20:44,073 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 17:20:44,073 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 17:20:44,073 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 17:20:44,073 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 17:20:44,073 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 17:20:44,074 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 9 11) no Hoare annotation was computed. [2020-07-21 17:20:44,074 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-07-21 17:20:44,074 INFO L268 CegarLoopResult]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2020-07-21 17:20:44,074 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2020-07-21 17:20:44,074 INFO L264 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: (or (and (= 1 main_~x~0) (= 1 main_~y~0)) (exists ((v_main_~x~0_20 Int) (v_main_~y~0_21 Int)) (let ((.cse1 (+ (* v_main_~x~0_20 main_~z~0) 1)) (.cse0 (* v_main_~y~0_21 main_~z~0))) (and (= main_~y~0 .cse0) (= .cse1 main_~x~0) (= .cse1 (+ .cse0 v_main_~x~0_20)))))) [2020-07-21 17:20:44,074 INFO L268 CegarLoopResult]: For program point L32-1(lines 31 40) no Hoare annotation was computed. [2020-07-21 17:20:44,075 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 43) the Hoare annotation is: true [2020-07-21 17:20:44,075 INFO L264 CegarLoopResult]: At program point L31-2(lines 31 40) the Hoare annotation is: (or (and (= 1 main_~x~0) (= 1 main_~y~0)) (exists ((v_main_~x~0_20 Int) (v_main_~y~0_21 Int)) (let ((.cse1 (+ (* v_main_~x~0_20 main_~z~0) 1)) (.cse0 (* v_main_~y~0_21 main_~z~0))) (and (= main_~y~0 .cse0) (= .cse1 main_~x~0) (= .cse1 (+ .cse0 v_main_~x~0_20)))))) [2020-07-21 17:20:44,075 INFO L264 CegarLoopResult]: At program point L31-3(lines 31 40) the Hoare annotation is: (= (+ (* main_~x~0 main_~z~0) 1) (+ main_~x~0 (* main_~y~0 main_~z~0))) [2020-07-21 17:20:44,075 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 43) no Hoare annotation was computed. [2020-07-21 17:20:44,075 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 21 43) no Hoare annotation was computed. [2020-07-21 17:20:44,075 INFO L268 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-07-21 17:20:44,075 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2020-07-21 17:20:44,076 INFO L268 CegarLoopResult]: For program point L14(lines 14 15) no Hoare annotation was computed. [2020-07-21 17:20:44,076 INFO L268 CegarLoopResult]: For program point L13(lines 13 16) no Hoare annotation was computed. [2020-07-21 17:20:44,076 INFO L268 CegarLoopResult]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2020-07-21 17:20:44,076 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2020-07-21 17:20:44,076 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2020-07-21 17:20:44,084 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] [2020-07-21 17:20:44,085 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 17:20:44,086 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 17:20:44,086 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] [2020-07-21 17:20:44,086 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 17:20:44,092 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] [2020-07-21 17:20:44,092 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 17:20:44,092 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 17:20:44,093 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] [2020-07-21 17:20:44,093 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 17:20:44,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 05:20:44 BoogieIcfgContainer [2020-07-21 17:20:44,095 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 17:20:44,097 INFO L168 Benchmark]: Toolchain (without parser) took 207121.40 ms. Allocated memory was 137.9 MB in the beginning and 245.9 MB in the end (delta: 108.0 MB). Free memory was 101.0 MB in the beginning and 185.5 MB in the end (delta: -84.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-07-21 17:20:44,098 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 17:20:44,099 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.03 ms. Allocated memory is still 137.9 MB. Free memory was 100.6 MB in the beginning and 91.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 17:20:44,100 INFO L168 Benchmark]: Boogie Preprocessor took 107.38 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 91.1 MB in the beginning and 180.8 MB in the end (delta: -89.7 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. [2020-07-21 17:20:44,101 INFO L168 Benchmark]: RCFGBuilder took 259.70 ms. Allocated memory is still 200.8 MB. Free memory was 180.8 MB in the beginning and 167.5 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-07-21 17:20:44,102 INFO L168 Benchmark]: TraceAbstraction took 206513.45 ms. Allocated memory was 200.8 MB in the beginning and 245.9 MB in the end (delta: 45.1 MB). Free memory was 167.5 MB in the beginning and 185.5 MB in the end (delta: -18.0 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. [2020-07-21 17:20:44,105 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 234.03 ms. Allocated memory is still 137.9 MB. Free memory was 100.6 MB in the beginning and 91.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.38 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 91.1 MB in the beginning and 180.8 MB in the end (delta: -89.7 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 259.70 ms. Allocated memory is still 200.8 MB. Free memory was 180.8 MB in the beginning and 167.5 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 206513.45 ms. Allocated memory was 200.8 MB in the beginning and 245.9 MB in the end (delta: 45.1 MB). Free memory was 167.5 MB in the beginning and 185.5 MB in the end (delta: -18.0 MB). Peak memory consumption was 27.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: 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: 31]: Loop Invariant [2020-07-21 17:20:44,114 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] [2020-07-21 17:20:44,114 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 17:20:44,114 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 17:20:44,115 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] [2020-07-21 17:20:44,115 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 17:20:44,115 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] [2020-07-21 17:20:44,115 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 17:20:44,116 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] [2020-07-21 17:20:44,116 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_21,QUANTIFIED] [2020-07-21 17:20:44,116 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~x~0_20,QUANTIFIED] Derived loop invariant: (1 == x && 1 == y) || (\exists v_main_~x~0_20 : int, v_main_~y~0_21 : int :: (y == v_main_~y~0_21 * z && v_main_~x~0_20 * z + 1 == x) && v_main_~x~0_20 * z + 1 == v_main_~y~0_21 * z + v_main_~x~0_20) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 180.8s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 87.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 25.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 83 SDtfs, 53 SDslu, 283 SDs, 0 SdLazy, 187 SolverSat, 25 SolverUnsat, 23 SolverUnknown, 0 SolverNotchecked, 49.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 196 GetRequests, 136 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 106.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=5, 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, 6 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 15 PreInvPairs, 25 NumberOfFragments, 82 HoareAnnotationTreeSize, 15 FomulaSimplifications, 296 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 105 FormulaSimplificationTreeSizeReductionInter, 25.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 91.4s InterpolantComputationTime, 115 NumberOfCodeBlocks, 115 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 170 ConstructedInterpolants, 5 QuantifiedInterpolants, 19122 SizeOfPredicates, 19 NumberOfNonLiveVariables, 333 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 62/93 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...