/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 DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/geo3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:57:00,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:57:00,624 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:57:00,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:57:00,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:57:00,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:57:00,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:57:00,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:57:00,647 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:57:00,648 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:57:00,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:57:00,650 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:57:00,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:57:00,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:57:00,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:57:00,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:57:00,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:57:00,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:57:00,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:57:00,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:57:00,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:57:00,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:57:00,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:57:00,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:57:00,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:57:00,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:57:00,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:57:00,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:57:00,680 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 22:57:00,705 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:57:00,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:57:00,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:57:00,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:57:00,708 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:57:00,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:57:00,709 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:57:00,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:57:00,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:57:00,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:57:00,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:57:00,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:57:00,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:57:00,711 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:57:00,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:57:00,712 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:57:00,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:57:00,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:57:00,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:57:00,713 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:57:00,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:57:00,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:57:00,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:57:00,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:57:00,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:57:00,715 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:57:00,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:00,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:57:00,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:57:00,715 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 -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:57:01,025 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:57:01,039 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:57:01,043 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:57:01,044 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:57:01,045 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:57:01,046 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo3.c [2020-07-20 22:57:01,112 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/497f61430/dfafce596a8e4772a690d774e01d7ad5/FLAG4bb7a93fa [2020-07-20 22:57:01,606 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:57:01,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo3.c [2020-07-20 22:57:01,614 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/497f61430/dfafce596a8e4772a690d774e01d7ad5/FLAG4bb7a93fa [2020-07-20 22:57:02,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/497f61430/dfafce596a8e4772a690d774e01d7ad5 [2020-07-20 22:57:02,025 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:57:02,028 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:57:02,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:57:02,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:57:02,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:57:02,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:57:02" (1/1) ... [2020-07-20 22:57:02,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@602fa461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:02, skipping insertion in model container [2020-07-20 22:57:02,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:57:02" (1/1) ... [2020-07-20 22:57:02,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:57:02,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:57:02,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:57:02,285 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:57:02,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:57:02,316 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:57:02,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:02 WrapperNode [2020-07-20 22:57:02,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:57:02,317 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:57:02,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:57:02,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:57:02,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:02" (1/1) ... [2020-07-20 22:57:02,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:02" (1/1) ... [2020-07-20 22:57:02,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:02" (1/1) ... [2020-07-20 22:57:02,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:02" (1/1) ... [2020-07-20 22:57:02,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:02" (1/1) ... [2020-07-20 22:57:02,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:02" (1/1) ... [2020-07-20 22:57:02,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:02" (1/1) ... [2020-07-20 22:57:02,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:57:02,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:57:02,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:57:02,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:57:02,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:57:02,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:57:02,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:57:02,498 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:57:02,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:57:02,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:57:02,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:57:02,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:57:02,500 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:57:02,500 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:57:02,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:57:02,501 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:57:02,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:57:02,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:57:02,697 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:57:02,698 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 22:57:02,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:57:02 BoogieIcfgContainer [2020-07-20 22:57:02,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:57:02,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:57:02,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:57:02,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:57:02,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:57:02" (1/3) ... [2020-07-20 22:57:02,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6b41ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:57:02, skipping insertion in model container [2020-07-20 22:57:02,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:02" (2/3) ... [2020-07-20 22:57:02,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f6b41ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:57:02, skipping insertion in model container [2020-07-20 22:57:02,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:57:02" (3/3) ... [2020-07-20 22:57:02,710 INFO L109 eAbstractionObserver]: Analyzing ICFG geo3.c [2020-07-20 22:57:02,719 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:57:02,727 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:57:02,742 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:57:02,765 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:57:02,766 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:57:02,766 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:57:02,766 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:57:02,766 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:57:02,766 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:57:02,766 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:57:02,766 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:57:02,783 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 22:57:02,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 22:57:02,791 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:57:02,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:57:02,792 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:57:02,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:57:02,799 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-20 22:57:02,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:57:02,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407435708] [2020-07-20 22:57:02,807 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:02,882 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:57:02,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:57:02,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:57:02,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:57:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:57:03,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:57:03,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407435708] [2020-07-20 22:57:03,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:57:03,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:57:03,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757720997] [2020-07-20 22:57:03,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:57:03,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:57:03,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:57:03,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:57:03,089 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 22:57:03,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:57:03,218 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2020-07-20 22:57:03,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:57:03,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 22:57:03,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:57:03,228 INFO L225 Difference]: With dead ends: 46 [2020-07-20 22:57:03,229 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 22:57:03,233 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 [2020-07-20 22:57:03,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 22:57:03,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-20 22:57:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 22:57:03,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-20 22:57:03,276 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-20 22:57:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:57:03,276 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-20 22:57:03,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:57:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-20 22:57:03,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 22:57:03,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:57:03,278 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:57:03,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:03,479 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:57:03,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:57:03,481 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-20 22:57:03,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:57:03,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236486215] [2020-07-20 22:57:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:03,523 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:57:03,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:57:03,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 22:57:03,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:57:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:57:03,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:57:03,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:57:09,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:57:09,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236486215] [2020-07-20 22:57:09,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:57:09,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-20 22:57:09,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788893406] [2020-07-20 22:57:09,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 22:57:09,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:57:09,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 22:57:09,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=38, Unknown=3, NotChecked=0, Total=56 [2020-07-20 22:57:09,896 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2020-07-20 22:57:16,184 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 22:57:26,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:57:26,531 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-20 22:57:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 22:57:26,533 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-20 22:57:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:57:26,536 INFO L225 Difference]: With dead ends: 32 [2020-07-20 22:57:26,536 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 22:57:26,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=23, Invalid=63, Unknown=4, NotChecked=0, Total=90 [2020-07-20 22:57:26,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 22:57:26,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-07-20 22:57:26,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 22:57:26,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-07-20 22:57:26,557 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 17 [2020-07-20 22:57:26,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:57:26,557 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-07-20 22:57:26,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 22:57:26,558 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-07-20 22:57:26,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 22:57:26,560 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:57:26,561 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:57:26,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:26,762 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:57:26,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:57:26,763 INFO L82 PathProgramCache]: Analyzing trace with hash 325764102, now seen corresponding path program 1 times [2020-07-20 22:57:26,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:57:26,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874810767] [2020-07-20 22:57:26,767 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:26,799 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:57:26,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:57:26,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 22:57:26,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:57:26,880 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:57:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 22:57:26,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:57:29,192 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 22:57:29,198 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 22:57:29,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:57:29,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:57:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 22:57:29,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874810767] [2020-07-20 22:57:29,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:57:29,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-07-20 22:57:29,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872766824] [2020-07-20 22:57:29,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 22:57:29,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:57:29,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 22:57:29,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-20 22:57:29,308 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 9 states. [2020-07-20 22:57:31,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:57:31,710 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-07-20 22:57:31,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 22:57:31,711 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-07-20 22:57:31,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:57:31,714 INFO L225 Difference]: With dead ends: 34 [2020-07-20 22:57:31,714 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 22:57:31,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 22:57:31,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 22:57:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 22:57:31,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 22:57:31,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-20 22:57:31,722 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 23 [2020-07-20 22:57:31,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:57:31,723 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-20 22:57:31,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 22:57:31,723 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-20 22:57:31,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 22:57:31,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:57:31,724 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:57:31,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:31,939 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:57:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:57:31,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-20 22:57:31,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:57:31,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084447154] [2020-07-20 22:57:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:31,977 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:57:31,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:57:31,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 22:57:31,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:57:37,666 WARN L193 SmtUtils]: Spent 3.58 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 22:57:37,813 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 22:57:37,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:57:37,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:57:52,487 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 22:57:52,559 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 22:57:52,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:57:54,600 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0))) (or (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0)) (+ (* c_main_~z~0 c_main_~a~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 c_main_~a~0) (+ c_main_~x~0 (* c_main_~y~0 c_main_~z~0 c_main_~a~0)))))) is different from true [2020-07-20 22:57:54,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:57:54,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:57:58,379 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (or (= (+ (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~a~0) .cse0) (+ (* c_main_~z~0 c_main_~z~0 c_main_~a~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (not (= (+ (* c_main_~x~0 c_main_~z~0) (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0)) (+ (* c_main_~z~0 c_main_~a~0) .cse0))))) is different from true [2020-07-20 22:57:58,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:57:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2020-07-20 22:57:58,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084447154] [2020-07-20 22:57:58,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:57:58,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-07-20 22:57:58,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743901233] [2020-07-20 22:57:58,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 22:57:58,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:57:58,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 22:57:58,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=120, Unknown=9, NotChecked=46, Total=210 [2020-07-20 22:57:58,411 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 15 states. [2020-07-20 22:58:20,128 WARN L193 SmtUtils]: Spent 14.66 s on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-07-20 22:58:29,532 WARN L193 SmtUtils]: Spent 3.21 s on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 22:58:41,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:58:41,180 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-07-20 22:58:41,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 22:58:41,181 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-07-20 22:58:41,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:58:41,183 INFO L225 Difference]: With dead ends: 37 [2020-07-20 22:58:41,183 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 22:58:41,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 47.9s TimeCoverageRelationStatistics Valid=58, Invalid=211, Unknown=11, NotChecked=62, Total=342 [2020-07-20 22:58:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 22:58:41,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-20 22:58:41,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 22:58:41,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-07-20 22:58:41,192 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2020-07-20 22:58:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:58:41,192 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-07-20 22:58:41,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 22:58:41,192 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-07-20 22:58:41,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 22:58:41,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:58:41,194 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:58:41,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:41,395 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:58:41,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:58:41,396 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-20 22:58:41,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:58:41,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717960746] [2020-07-20 22:58:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:41,472 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:58:41,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:58:41,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-20 22:58:41,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:58:46,322 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 22:58:51,166 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 22:58:53,071 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:59:27,142 WARN L193 SmtUtils]: Spent 14.18 s on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 22:59:27,145 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:59:35,346 WARN L838 $PredicateComparison]: unable to prove that (or (<= 1 c___VERIFIER_assert_~cond) (and (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~y~0_21 Int) (v_main_~z~0_BEFORE_CALL_12 Int)) (and (not (= (* v_main_~a~0_BEFORE_CALL_15 v_main_~y~0_21 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12) (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12))) (= (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12) (* v_main_~a~0_BEFORE_CALL_15 v_main_~y~0_21 v_main_~z~0_BEFORE_CALL_12)))) (<= 0 c___VERIFIER_assert_~cond))) is different from false [2020-07-20 22:59:37,384 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:59:45,572 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~y~0_21 Int) (v_main_~z~0_BEFORE_CALL_12 Int)) (and (not (= (* v_main_~a~0_BEFORE_CALL_15 v_main_~y~0_21 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12) (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12))) (= (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12) (* v_main_~a~0_BEFORE_CALL_15 v_main_~y~0_21 v_main_~z~0_BEFORE_CALL_12)))) is different from false [2020-07-20 22:59:47,584 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~y~0_21 Int) (v_main_~z~0_BEFORE_CALL_12 Int)) (and (not (= (* v_main_~a~0_BEFORE_CALL_15 v_main_~y~0_21 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12) (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12))) (= (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12) (* v_main_~a~0_BEFORE_CALL_15 v_main_~y~0_21 v_main_~z~0_BEFORE_CALL_12)))) is different from true [2020-07-20 22:59:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2020-07-20 22:59:47,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:59:52,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 23:00:17,841 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 23:00:18,053 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 23:00:18,072 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 23:00:18,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 23:00:20,140 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~y~0 Int)) (let ((.cse0 (* c_main_~x~0 c_main_~z~0))) (or (= (+ .cse0 (* main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~a~0)) (+ (* c_main_~z~0 c_main_~a~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 c_main_~a~0) (+ c_main_~x~0 (* main_~y~0 c_main_~z~0 c_main_~a~0))))))) is different from true [2020-07-20 23:00:20,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717960746] [2020-07-20 23:00:20,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 23:00:20,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-20 23:00:20,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486922871] [2020-07-20 23:00:20,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 23:00:20,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:20,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 23:00:20,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=163, Unknown=20, NotChecked=84, Total=306 [2020-07-20 23:00:20,143 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 13 states. [2020-07-20 23:00:34,583 WARN L193 SmtUtils]: Spent 8.14 s on a formula simplification. DAG size of input: 28 DAG size of output: 6 [2020-07-20 23:00:54,871 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 23:01:09,656 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~y~0_21 Int) (v_main_~z~0_BEFORE_CALL_12 Int)) (and (not (= (* v_main_~a~0_BEFORE_CALL_15 v_main_~y~0_21 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12) (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12))) (= (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12) (* v_main_~a~0_BEFORE_CALL_15 v_main_~y~0_21 v_main_~z~0_BEFORE_CALL_12)))))) (and (or (<= 1 |c___VERIFIER_assert_#in~cond|) (and .cse0 (<= 0 |c___VERIFIER_assert_#in~cond|))) (or (<= 1 c___VERIFIER_assert_~cond) (and .cse0 (<= 0 c___VERIFIER_assert_~cond))) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond))) is different from false [2020-07-20 23:01:26,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:01:26,688 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-07-20 23:01:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 23:01:26,689 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-07-20 23:01:26,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:01:26,690 INFO L225 Difference]: With dead ends: 44 [2020-07-20 23:01:26,691 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 23:01:26,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 105.7s TimeCoverageRelationStatistics Valid=58, Invalid=241, Unknown=23, NotChecked=140, Total=462 [2020-07-20 23:01:26,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 23:01:26,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-20 23:01:26,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 23:01:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-07-20 23:01:26,699 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 31 [2020-07-20 23:01:26,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:01:26,700 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-07-20 23:01:26,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 23:01:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-07-20 23:01:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 23:01:26,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:01:26,701 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:01:26,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:01:26,906 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:01:26,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:01:26,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1264228465, now seen corresponding path program 4 times [2020-07-20 23:01:26,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:01:26,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548001701] [2020-07-20 23:01:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in