/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/geo1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:40:52,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:40:52,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:40:52,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:40:52,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:40:52,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:40:52,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:40:52,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:40:52,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:40:52,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:40:52,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:40:52,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:40:52,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:40:52,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:40:52,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:40:52,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:40:52,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:40:52,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:40:52,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:40:52,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:40:52,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:40:52,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:40:52,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:40:52,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:40:52,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:40:52,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:40:52,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:40:52,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:40:52,506 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 23:40:52,525 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:40:52,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:40:52,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:40:52,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:40:52,528 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:40:52,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:40:52,529 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:40:52,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:40:52,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:40:52,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:40:52,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:40:52,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:40:52,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:40:52,531 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:40:52,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:40:52,531 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:40:52,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:40:52,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:40:52,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:40:52,532 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:40:52,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:40:52,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:40:52,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:40:52,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:40:52,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:40:52,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:40:52,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:40:52,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:40:52,534 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:40:52,535 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:40:52,935 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:40:52,954 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:40:52,960 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:40:52,962 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:40:52,963 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:40:52,964 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo1.c [2020-07-21 23:40:53,053 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/616e6b342/a1adfce331294c0098607ad3eb8595b8/FLAGa442047eb [2020-07-21 23:40:53,683 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:40:53,685 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo1.c [2020-07-21 23:40:53,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/616e6b342/a1adfce331294c0098607ad3eb8595b8/FLAGa442047eb [2020-07-21 23:40:53,982 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/616e6b342/a1adfce331294c0098607ad3eb8595b8 [2020-07-21 23:40:53,999 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:40:54,003 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:40:54,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:40:54,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:40:54,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:40:54,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:40:53" (1/1) ... [2020-07-21 23:40:54,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f9c8426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:54, skipping insertion in model container [2020-07-21 23:40:54,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:40:53" (1/1) ... [2020-07-21 23:40:54,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:40:54,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:40:54,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:40:54,283 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:40:54,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:40:54,320 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:40:54,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:54 WrapperNode [2020-07-21 23:40:54,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:40:54,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:40:54,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:40:54,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:40:54,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:54" (1/1) ... [2020-07-21 23:40:54,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:54" (1/1) ... [2020-07-21 23:40:54,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:54" (1/1) ... [2020-07-21 23:40:54,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:54" (1/1) ... [2020-07-21 23:40:54,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:54" (1/1) ... [2020-07-21 23:40:54,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:54" (1/1) ... [2020-07-21 23:40:54,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:54" (1/1) ... [2020-07-21 23:40:54,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:40:54,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:40:54,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:40:54,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:40:54,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:40:54,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:40:54,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:40:54,560 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:40:54,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:40:54,560 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:40:54,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:40:54,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:40:54,561 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:40:54,567 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:40:54,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:40:54,571 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:40:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:40:54,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:40:54,874 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:40:54,875 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:40:54,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:40:54 BoogieIcfgContainer [2020-07-21 23:40:54,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:40:54,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:40:54,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:40:54,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:40:54,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:40:53" (1/3) ... [2020-07-21 23:40:54,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10bbf183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:40:54, skipping insertion in model container [2020-07-21 23:40:54,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:54" (2/3) ... [2020-07-21 23:40:54,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10bbf183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:40:54, skipping insertion in model container [2020-07-21 23:40:54,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:40:54" (3/3) ... [2020-07-21 23:40:54,907 INFO L109 eAbstractionObserver]: Analyzing ICFG geo1.c [2020-07-21 23:40:54,929 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:40:54,942 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:40:54,966 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:40:55,002 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:40:55,002 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:40:55,002 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:40:55,002 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:40:55,002 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:40:55,003 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:40:55,003 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:40:55,003 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:40:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 23:40:55,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 23:40:55,036 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:40:55,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:40:55,038 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:40:55,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:40:55,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1923958992, now seen corresponding path program 1 times [2020-07-21 23:40:55,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:40:55,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804948739] [2020-07-21 23:40:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:40:55,149 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:40:55,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:40:55,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 23:40:55,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:40:55,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:40:55,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:40:55,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804948739] [2020-07-21 23:40:55,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:40:55,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:40:55,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474203747] [2020-07-21 23:40:55,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:40:55,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:40:55,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:40:55,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:40:55,335 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-07-21 23:40:55,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:40:55,455 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2020-07-21 23:40:55,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:40:55,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 23:40:55,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:40:55,471 INFO L225 Difference]: With dead ends: 45 [2020-07-21 23:40:55,472 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 23:40:55,480 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 23:40:55,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 23:40:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-07-21 23:40:55,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 23:40:55,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-21 23:40:55,546 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-21 23:40:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:40:55,548 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-21 23:40:55,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:40:55,548 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-21 23:40:55,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 23:40:55,550 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:40:55,550 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:40:55,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:40:55,767 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:40:55,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:40:55,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1187633082, now seen corresponding path program 1 times [2020-07-21 23:40:55,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:40:55,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022043699] [2020-07-21 23:40:55,770 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:40:55,834 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:40:55,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:40:55,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 23:40:55,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:40:56,144 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:40:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:40:56,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:40:56,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:40:56,404 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 23:40:56,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:40:56,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:40:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:40:56,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022043699] [2020-07-21 23:40:56,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:40:56,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-21 23:40:56,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445670389] [2020-07-21 23:40:56,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 23:40:56,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:40:56,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 23:40:56,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-21 23:40:56,454 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 10 states. [2020-07-21 23:40:58,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:40:58,767 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-07-21 23:40:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:40:58,768 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-07-21 23:40:58,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:40:58,771 INFO L225 Difference]: With dead ends: 28 [2020-07-21 23:40:58,772 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 23:40:58,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:40:58,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 23:40:58,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 23:40:58,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 23:40:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-21 23:40:58,783 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-07-21 23:40:58,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:40:58,784 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-21 23:40:58,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 23:40:58,784 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-21 23:40:58,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 23:40:58,785 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:40:58,786 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:40:58,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:40:59,000 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:40:59,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:40:59,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1235596592, now seen corresponding path program 1 times [2020-07-21 23:40:59,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:40:59,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468142960] [2020-07-21 23:40:59,002 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:40:59,044 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:40:59,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:40:59,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 23:40:59,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:40:59,144 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 23:40:59,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:40:59,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:41:05,472 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 23:41:05,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468142960] [2020-07-21 23:41:05,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:41:05,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 23:41:05,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143050071] [2020-07-21 23:41:05,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:41:05,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:41:05,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:41:05,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=38, Unknown=3, NotChecked=0, Total=56 [2020-07-21 23:41:05,476 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2020-07-21 23:41:13,831 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 23:41:22,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:41:22,537 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-07-21 23:41:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 23:41:22,561 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-21 23:41:22,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:41:22,562 INFO L225 Difference]: With dead ends: 30 [2020-07-21 23:41:22,563 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 23:41:22,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=23, Invalid=63, Unknown=4, NotChecked=0, Total=90 [2020-07-21 23:41:22,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 23:41:22,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-07-21 23:41:22,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 23:41:22,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-21 23:41:22,573 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2020-07-21 23:41:22,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:41:22,573 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-21 23:41:22,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:41:22,574 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-21 23:41:22,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 23:41:22,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:41:22,575 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:41:22,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:41:22,790 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:41:22,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:41:22,790 INFO L82 PathProgramCache]: Analyzing trace with hash -677841104, now seen corresponding path program 2 times [2020-07-21 23:41:22,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:41:22,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826945688] [2020-07-21 23:41:22,792 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:41:22,831 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:41:22,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:41:22,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 23:41:22,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:41:29,220 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 23:41:30,635 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 23:41:30,748 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 23:41:30,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:41:31,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:41:44,109 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 23:41:44,163 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 23:41:44,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:41:46,249 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0))) (or (= (+ (* c_main_~y~0 c_main_~z~0) .cse0) (+ c_main_~z~0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ c_main_~y~0 c_main_~x~0) (+ .cse0 1))))) is different from true [2020-07-21 23:41:46,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:41:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2020-07-21 23:41:46,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826945688] [2020-07-21 23:41:46,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:41:46,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2020-07-21 23:41:46,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485763842] [2020-07-21 23:41:46,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 23:41:46,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:41:46,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 23:41:46,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=119, Unknown=8, NotChecked=22, Total=182 [2020-07-21 23:41:46,496 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2020-07-21 23:42:11,889 WARN L193 SmtUtils]: Spent 18.26 s on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-07-21 23:42:32,219 WARN L193 SmtUtils]: Spent 17.26 s on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-07-21 23:42:47,019 WARN L193 SmtUtils]: Spent 6.56 s on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 23:42:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:42:47,654 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-21 23:42:47,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:42:47,655 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-07-21 23:42:47,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:42:47,656 INFO L225 Difference]: With dead ends: 31 [2020-07-21 23:42:47,656 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 23:42:47,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 75.2s TimeCoverageRelationStatistics Valid=58, Invalid=207, Unknown=11, NotChecked=30, Total=306 [2020-07-21 23:42:47,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 23:42:47,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 23:42:47,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 23:42:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 23:42:47,659 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2020-07-21 23:42:47,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:42:47,659 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 23:42:47,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 23:42:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 23:42:47,660 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 23:42:47,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:42:47,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 23:42:54,204 WARN L193 SmtUtils]: Spent 6.25 s on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2020-07-21 23:42:58,898 WARN L193 SmtUtils]: Spent 4.69 s on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2020-07-21 23:42:58,901 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 23:42:58,901 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:42:58,901 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 23:42:58,901 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 23:42:58,902 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 23:42:58,902 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 23:42:58,902 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 10 12) no Hoare annotation was computed. [2020-07-21 23:42:58,902 INFO L268 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-07-21 23:42:58,902 INFO L268 CegarLoopResult]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2020-07-21 23:42:58,903 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2020-07-21 23:42:58,903 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 (* main_~x~0 main_~z~0))) (and (= (+ (* main_~y~0 main_~z~0) .cse0) (+ (* main_~x~0 main_~z~0 main_~z~0) main_~z~0)) (= (+ .cse0 1) (+ main_~x~0 main_~y~0)))) [2020-07-21 23:42:58,903 INFO L268 CegarLoopResult]: For program point L31-1(lines 30 40) no Hoare annotation was computed. [2020-07-21 23:42:58,903 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 20 46) the Hoare annotation is: true [2020-07-21 23:42:58,903 INFO L264 CegarLoopResult]: At program point L30-2(lines 30 40) the Hoare annotation is: (let ((.cse0 (* main_~x~0 main_~z~0))) (and (= (+ (* main_~y~0 main_~z~0) .cse0) (+ (* main_~x~0 main_~z~0 main_~z~0) main_~z~0)) (= (+ .cse0 1) (+ main_~x~0 main_~y~0)))) [2020-07-21 23:42:58,904 INFO L268 CegarLoopResult]: For program point L30-3(lines 30 40) no Hoare annotation was computed. [2020-07-21 23:42:58,904 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 20 46) no Hoare annotation was computed. [2020-07-21 23:42:58,904 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 20 46) no Hoare annotation was computed. [2020-07-21 23:42:58,904 INFO L264 CegarLoopResult]: At program point L44(line 44) the Hoare annotation is: (= main_~y~0 (+ main_~x~0 1)) [2020-07-21 23:42:58,904 INFO L268 CegarLoopResult]: For program point L44-1(line 44) no Hoare annotation was computed. [2020-07-21 23:42:58,904 INFO L268 CegarLoopResult]: For program point L15(lines 15 16) no Hoare annotation was computed. [2020-07-21 23:42:58,904 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2020-07-21 23:42:58,905 INFO L268 CegarLoopResult]: For program point L14(lines 14 17) no Hoare annotation was computed. [2020-07-21 23:42:58,905 INFO L268 CegarLoopResult]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2020-07-21 23:42:58,905 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2020-07-21 23:42:58,906 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-21 23:42:58,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:42:58 BoogieIcfgContainer [2020-07-21 23:42:58,922 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:42:58,926 INFO L168 Benchmark]: Toolchain (without parser) took 124923.70 ms. Allocated memory was 143.1 MB in the beginning and 230.7 MB in the end (delta: 87.6 MB). Free memory was 101.2 MB in the beginning and 103.6 MB in the end (delta: -2.4 MB). Peak memory consumption was 85.2 MB. Max. memory is 7.1 GB. [2020-07-21 23:42:58,927 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 143.1 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 23:42:58,928 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.49 ms. Allocated memory is still 143.1 MB. Free memory was 100.8 MB in the beginning and 91.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-21 23:42:58,929 INFO L168 Benchmark]: Boogie Preprocessor took 152.22 ms. Allocated memory was 143.1 MB in the beginning and 201.9 MB in the end (delta: 58.7 MB). Free memory was 91.3 MB in the beginning and 181.9 MB in the end (delta: -90.6 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-07-21 23:42:58,930 INFO L168 Benchmark]: RCFGBuilder took 409.90 ms. Allocated memory is still 201.9 MB. Free memory was 181.9 MB in the beginning and 167.8 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-21 23:42:58,932 INFO L168 Benchmark]: TraceAbstraction took 124035.21 ms. Allocated memory was 201.9 MB in the beginning and 230.7 MB in the end (delta: 28.8 MB). Free memory was 167.8 MB in the beginning and 103.6 MB in the end (delta: 64.2 MB). Peak memory consumption was 93.0 MB. Max. memory is 7.1 GB. [2020-07-21 23:42:58,935 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 143.1 MB. Free memory was 119.3 MB in the beginning and 119.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 317.49 ms. Allocated memory is still 143.1 MB. Free memory was 100.8 MB in the beginning and 91.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 152.22 ms. Allocated memory was 143.1 MB in the beginning and 201.9 MB in the end (delta: 58.7 MB). Free memory was 91.3 MB in the beginning and 181.9 MB in the end (delta: -90.6 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 409.90 ms. Allocated memory is still 201.9 MB. Free memory was 181.9 MB in the beginning and 167.8 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 124035.21 ms. Allocated memory was 201.9 MB in the beginning and 230.7 MB in the end (delta: 28.8 MB). Free memory was 167.8 MB in the beginning and 103.6 MB in the end (delta: 64.2 MB). Peak memory consumption was 93.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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: 30]: Loop Invariant Derived loop invariant: y * z + x * z == x * z * z + z && x * z + 1 == x + y - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 112.8s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 80.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 11.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 54 SDtfs, 39 SDslu, 237 SDs, 0 SdLazy, 154 SolverSat, 25 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 22.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 138 GetRequests, 87 SyntacticMatches, 13 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 88.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 23 NumberOfFragments, 58 HoareAnnotationTreeSize, 14 FomulaSimplifications, 162 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 34 FormulaSimplificationTreeSizeReductionInter, 10.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 30.8s InterpolantComputationTime, 68 NumberOfCodeBlocks, 67 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 119 ConstructedInterpolants, 1 QuantifiedInterpolants, 9628 SizeOfPredicates, 15 NumberOfNonLiveVariables, 198 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 25/42 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...