/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 02:11:50,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:11:50,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:11:50,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 02:11:50,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 02:11:50,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 02:11:50,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 02:11:50,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 02:11:50,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 02:11:50,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 02:11:50,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 02:11:50,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 02:11:50,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:11:50,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:11:50,995 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:11:50,996 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:11:50,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:11:50,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:11:51,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:11:51,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:11:51,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:11:51,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:11:51,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:11:51,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:11:51,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 02:11:51,023 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 02:11:51,040 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:11:51,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:11:51,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:11:51,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:11:51,042 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:11:51,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:11:51,042 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:11:51,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:11:51,043 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:11:51,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:11:51,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:11:51,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:11:51,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:11:51,044 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:11:51,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:11:51,044 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:11:51,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:11:51,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:11:51,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:11:51,045 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:11:51,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:11:51,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:11:51,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:11:51,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:11:51,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:11:51,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:11:51,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:11:51,046 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:11:51,047 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:11:51,047 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 02:11:51,343 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:11:51,356 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:11:51,360 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:11:51,362 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:11:51,362 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:11:51,363 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo1.c [2020-07-21 02:11:51,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/750e55fff/7df703cca5a44a26a33a344bd8eb0d87/FLAGbed7396ff [2020-07-21 02:11:52,010 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:11:52,011 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo1.c [2020-07-21 02:11:52,019 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/750e55fff/7df703cca5a44a26a33a344bd8eb0d87/FLAGbed7396ff [2020-07-21 02:11:52,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/750e55fff/7df703cca5a44a26a33a344bd8eb0d87 [2020-07-21 02:11:52,320 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:11:52,323 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:11:52,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:11:52,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:11:52,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:11:52,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:11:52" (1/1) ... [2020-07-21 02:11:52,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37213b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:52, skipping insertion in model container [2020-07-21 02:11:52,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:11:52" (1/1) ... [2020-07-21 02:11:52,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:11:52,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:11:52,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:11:52,558 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:11:52,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:11:52,589 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:11:52,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:52 WrapperNode [2020-07-21 02:11:52,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:11:52,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:11:52,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:11:52,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:11:52,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:52" (1/1) ... [2020-07-21 02:11:52,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:52" (1/1) ... [2020-07-21 02:11:52,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:52" (1/1) ... [2020-07-21 02:11:52,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:52" (1/1) ... [2020-07-21 02:11:52,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:52" (1/1) ... [2020-07-21 02:11:52,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:52" (1/1) ... [2020-07-21 02:11:52,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:52" (1/1) ... [2020-07-21 02:11:52,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:11:52,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:11:52,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:11:52,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:11:52,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:52" (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 02:11:52,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:11:52,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:11:52,792 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:11:52,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 02:11:52,792 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:11:52,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:11:52,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 02:11:52,793 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:11:52,793 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:11:52,793 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 02:11:52,793 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:11:52,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:11:52,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:11:52,986 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:11:52,986 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 02:11:52,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:11:52 BoogieIcfgContainer [2020-07-21 02:11:52,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:11:52,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:11:52,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:11:52,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:11:52,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:11:52" (1/3) ... [2020-07-21 02:11:52,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29cc63de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:11:52, skipping insertion in model container [2020-07-21 02:11:52,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:11:52" (2/3) ... [2020-07-21 02:11:52,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29cc63de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:11:52, skipping insertion in model container [2020-07-21 02:11:52,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:11:52" (3/3) ... [2020-07-21 02:11:53,000 INFO L109 eAbstractionObserver]: Analyzing ICFG geo1.c [2020-07-21 02:11:53,012 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:11:53,020 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 02:11:53,036 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 02:11:53,061 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:11:53,061 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:11:53,062 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:11:53,062 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:11:53,062 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:11:53,062 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:11:53,062 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:11:53,062 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:11:53,080 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 02:11:53,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 02:11:53,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:11:53,088 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:11:53,089 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:11:53,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:11:53,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1923958992, now seen corresponding path program 1 times [2020-07-21 02:11:53,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:11:53,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846829990] [2020-07-21 02:11:53,104 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 02:11:53,184 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:11:53,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:11:53,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 02:11:53,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:11:53,340 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 02:11:53,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:11:53,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846829990] [2020-07-21 02:11:53,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:11:53,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 02:11:53,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782455229] [2020-07-21 02:11:53,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 02:11:53,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:11:53,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 02:11:53,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:11:53,362 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-07-21 02:11:53,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:11:53,474 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2020-07-21 02:11:53,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:11:53,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-21 02:11:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:11:53,489 INFO L225 Difference]: With dead ends: 45 [2020-07-21 02:11:53,489 INFO L226 Difference]: Without dead ends: 24 [2020-07-21 02:11:53,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 02:11:53,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-21 02:11:53,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-07-21 02:11:53,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-21 02:11:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-21 02:11:53,545 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-21 02:11:53,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:11:53,545 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-21 02:11:53,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 02:11:53,546 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-21 02:11:53,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 02:11:53,547 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:11:53,547 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:11:53,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:11:53,761 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:11:53,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:11:53,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1187633082, now seen corresponding path program 1 times [2020-07-21 02:11:53,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:11:53,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35909517] [2020-07-21 02:11:53,765 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 02:11:53,801 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 02:11:53,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:11:53,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 02:11:53,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:11:54,013 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 02:11:54,077 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 02:11:54,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 02:11:54,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:11:54,183 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 02:11:54,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:11:54,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:11:54,220 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 02:11:54,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35909517] [2020-07-21 02:11:54,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 02:11:54,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-21 02:11:54,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294957447] [2020-07-21 02:11:54,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 02:11:54,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:11:54,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 02:11:54,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-21 02:11:54,225 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 10 states. [2020-07-21 02:11:56,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:11:56,506 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-07-21 02:11:56,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 02:11:56,507 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-07-21 02:11:56,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:11:56,510 INFO L225 Difference]: With dead ends: 28 [2020-07-21 02:11:56,510 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 02:11:56,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-07-21 02:11:56,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 02:11:56,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 02:11:56,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 02:11:56,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-21 02:11:56,518 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-07-21 02:11:56,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:11:56,519 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-21 02:11:56,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 02:11:56,519 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-21 02:11:56,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 02:11:56,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:11:56,521 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:11:56,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:11:56,726 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:11:56,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:11:56,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1235596592, now seen corresponding path program 1 times [2020-07-21 02:11:56,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:11:56,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75958587] [2020-07-21 02:11:56,729 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 02:11:56,776 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 02:11:56,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:11:56,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 02:11:56,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:11:56,854 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 02:11:56,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 02:11:56,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:12:03,231 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 02:12:03,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75958587] [2020-07-21 02:12:03,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 02:12:03,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-21 02:12:03,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448059010] [2020-07-21 02:12:03,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 02:12:03,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:12:03,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 02:12:03,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=38, Unknown=3, NotChecked=0, Total=56 [2020-07-21 02:12:03,235 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2020-07-21 02:12:11,769 WARN L193 SmtUtils]: Spent 4.33 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 02:12:20,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:12:20,300 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-07-21 02:12:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 02:12:20,312 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-21 02:12:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:12:20,313 INFO L225 Difference]: With dead ends: 30 [2020-07-21 02:12:20,313 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 02:12:20,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=23, Invalid=63, Unknown=4, NotChecked=0, Total=90 [2020-07-21 02:12:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 02:12:20,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-07-21 02:12:20,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 02:12:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-07-21 02:12:20,321 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2020-07-21 02:12:20,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:12:20,322 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-07-21 02:12:20,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 02:12:20,322 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-07-21 02:12:20,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 02:12:20,323 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:12:20,323 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:12:20,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:12:20,537 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:12:20,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:12:20,538 INFO L82 PathProgramCache]: Analyzing trace with hash -677841104, now seen corresponding path program 2 times [2020-07-21 02:12:20,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:12:20,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592965296] [2020-07-21 02:12:20,540 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 02:12:20,583 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 02:12:20,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:12:20,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 02:12:20,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:12:27,516 WARN L193 SmtUtils]: Spent 4.74 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 02:12:28,176 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-21 02:12:28,282 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 02:12:28,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 02:12:28,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:12:41,457 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 02:12:41,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 02:12:43,534 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 02:12:43,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 02:12:44,997 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 02:12:44,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592965296] [2020-07-21 02:12:44,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 02:12:44,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2020-07-21 02:12:44,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39135810] [2020-07-21 02:12:44,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 02:12:44,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:12:44,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 02:12:44,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=119, Unknown=8, NotChecked=22, Total=182 [2020-07-21 02:12:45,000 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2020-07-21 02:13:10,672 WARN L193 SmtUtils]: Spent 18.63 s on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-07-21 02:13:33,971 WARN L193 SmtUtils]: Spent 19.67 s on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2020-07-21 02:13:50,553 WARN L193 SmtUtils]: Spent 6.26 s on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2020-07-21 02:13:51,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:13:51,352 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-21 02:13:51,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 02:13:51,353 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-07-21 02:13:51,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:13:51,354 INFO L225 Difference]: With dead ends: 31 [2020-07-21 02:13:51,354 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 02:13:51,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 78.5s TimeCoverageRelationStatistics Valid=58, Invalid=207, Unknown=11, NotChecked=30, Total=306 [2020-07-21 02:13:51,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 02:13:51,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 02:13:51,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 02:13:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 02:13:51,357 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2020-07-21 02:13:51,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:13:51,357 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 02:13:51,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 02:13:51,357 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 02:13:51,357 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 02:13:51,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:13:51,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 02:13:57,975 WARN L193 SmtUtils]: Spent 6.32 s on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2020-07-21 02:14:04,863 WARN L193 SmtUtils]: Spent 6.88 s on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2020-07-21 02:14:04,866 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 02:14:04,867 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 02:14:04,867 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 02:14:04,867 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 02:14:04,867 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 02:14:04,867 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 02:14:04,867 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 10 12) no Hoare annotation was computed. [2020-07-21 02:14:04,868 INFO L268 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-07-21 02:14:04,868 INFO L268 CegarLoopResult]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2020-07-21 02:14:04,868 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2020-07-21 02:14:04,868 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 02:14:04,868 INFO L268 CegarLoopResult]: For program point L31-1(lines 30 40) no Hoare annotation was computed. [2020-07-21 02:14:04,869 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 20 46) the Hoare annotation is: true [2020-07-21 02:14:04,869 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 02:14:04,869 INFO L268 CegarLoopResult]: For program point L30-3(lines 30 40) no Hoare annotation was computed. [2020-07-21 02:14:04,869 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 20 46) no Hoare annotation was computed. [2020-07-21 02:14:04,870 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 20 46) no Hoare annotation was computed. [2020-07-21 02:14:04,870 INFO L264 CegarLoopResult]: At program point L44(line 44) the Hoare annotation is: (= main_~y~0 (+ main_~x~0 1)) [2020-07-21 02:14:04,870 INFO L268 CegarLoopResult]: For program point L44-1(line 44) no Hoare annotation was computed. [2020-07-21 02:14:04,870 INFO L268 CegarLoopResult]: For program point L15(lines 15 16) no Hoare annotation was computed. [2020-07-21 02:14:04,870 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2020-07-21 02:14:04,870 INFO L268 CegarLoopResult]: For program point L14(lines 14 17) no Hoare annotation was computed. [2020-07-21 02:14:04,871 INFO L268 CegarLoopResult]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2020-07-21 02:14:04,871 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2020-07-21 02:14:04,871 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-21 02:14:04,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:14:04 BoogieIcfgContainer [2020-07-21 02:14:04,890 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 02:14:04,892 INFO L168 Benchmark]: Toolchain (without parser) took 132570.34 ms. Allocated memory was 137.9 MB in the beginning and 234.4 MB in the end (delta: 96.5 MB). Free memory was 103.2 MB in the beginning and 106.3 MB in the end (delta: -3.1 MB). Peak memory consumption was 93.4 MB. Max. memory is 7.1 GB. [2020-07-21 02:14:04,893 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 02:14:04,894 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.48 ms. Allocated memory is still 137.9 MB. Free memory was 102.8 MB in the beginning and 93.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-21 02:14:04,895 INFO L168 Benchmark]: Boogie Preprocessor took 115.96 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 93.1 MB in the beginning and 181.6 MB in the end (delta: -88.5 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-07-21 02:14:04,896 INFO L168 Benchmark]: RCFGBuilder took 280.92 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 168.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-07-21 02:14:04,898 INFO L168 Benchmark]: TraceAbstraction took 131897.90 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 167.9 MB in the beginning and 106.3 MB in the end (delta: 61.6 MB). Peak memory consumption was 94.1 MB. Max. memory is 7.1 GB. [2020-07-21 02:14:04,902 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 266.48 ms. Allocated memory is still 137.9 MB. Free memory was 102.8 MB in the beginning and 93.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.96 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 93.1 MB in the beginning and 181.6 MB in the end (delta: -88.5 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 280.92 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 168.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 131897.90 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 167.9 MB in the beginning and 106.3 MB in the end (delta: 61.6 MB). Peak memory consumption was 94.1 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: 118.5s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 85.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 13.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 54 SDtfs, 39 SDslu, 237 SDs, 0 SdLazy, 154 SolverSat, 25 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 23.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 138 GetRequests, 87 SyntacticMatches, 13 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 91.7s 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, 13.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 31.4s 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...