/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/sqrt1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:57:22,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:57:22,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:57:22,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:57:22,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:57:22,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:57:22,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:57:22,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:57:22,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:57:22,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:57:22,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:57:22,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:57:22,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:57:22,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:57:22,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:57:22,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:57:22,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:57:22,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:57:22,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:57:22,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:57:22,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:57:22,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:57:22,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:57:22,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:57:22,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:57:22,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:57:22,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:57:22,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:57:22,613 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 22:57:22,630 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:57:22,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:57:22,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:57:22,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:57:22,632 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:57:22,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:57:22,632 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:57:22,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:57:22,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:57:22,633 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:57:22,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:57:22,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:57:22,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:57:22,634 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:57:22,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:57:22,634 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:57:22,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:57:22,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:57:22,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:57:22,635 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:57:22,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:57:22,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:57:22,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:57:22,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:57:22,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:57:22,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:57:22,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:22,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:57:22,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:57:22,637 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 22:57:22,970 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:57:22,990 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:57:22,995 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:57:22,997 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:57:22,997 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:57:22,998 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-07-20 22:57:23,058 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d23ff034d/0938543a847641bca1ecc3a68d586812/FLAG767a1783a [2020-07-20 22:57:23,530 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:57:23,531 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1.c [2020-07-20 22:57:23,539 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d23ff034d/0938543a847641bca1ecc3a68d586812/FLAG767a1783a [2020-07-20 22:57:23,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d23ff034d/0938543a847641bca1ecc3a68d586812 [2020-07-20 22:57:23,907 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:57:23,909 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:57:23,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:57:23,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:57:23,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:57:23,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:57:23" (1/1) ... [2020-07-20 22:57:23,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d0c3774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:23, skipping insertion in model container [2020-07-20 22:57:23,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:57:23" (1/1) ... [2020-07-20 22:57:23,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:57:23,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:57:24,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:57:24,134 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:57:24,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:57:24,172 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:57:24,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:24 WrapperNode [2020-07-20 22:57:24,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:57:24,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:57:24,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:57:24,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:57:24,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:24" (1/1) ... [2020-07-20 22:57:24,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:24" (1/1) ... [2020-07-20 22:57:24,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:24" (1/1) ... [2020-07-20 22:57:24,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:24" (1/1) ... [2020-07-20 22:57:24,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:24" (1/1) ... [2020-07-20 22:57:24,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:24" (1/1) ... [2020-07-20 22:57:24,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:24" (1/1) ... [2020-07-20 22:57:24,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:57:24,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:57:24,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:57:24,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:57:24,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:57:24,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:57:24,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:57:24,355 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:57:24,355 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:57:24,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:57:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:57:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:57:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:57:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:57:24,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:57:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:57:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:57:24,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:57:24,559 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:57:24,560 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 22:57:24,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:57:24 BoogieIcfgContainer [2020-07-20 22:57:24,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:57:24,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:57:24,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:57:24,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:57:24,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:57:23" (1/3) ... [2020-07-20 22:57:24,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10463903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:57:24, skipping insertion in model container [2020-07-20 22:57:24,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:57:24" (2/3) ... [2020-07-20 22:57:24,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10463903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:57:24, skipping insertion in model container [2020-07-20 22:57:24,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:57:24" (3/3) ... [2020-07-20 22:57:24,571 INFO L109 eAbstractionObserver]: Analyzing ICFG sqrt1.c [2020-07-20 22:57:24,579 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:57:24,586 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:57:24,599 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:57:24,623 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:57:24,623 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:57:24,623 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:57:24,623 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:57:24,623 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:57:24,623 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:57:24,623 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:57:24,624 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:57:24,639 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 22:57:24,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 22:57:24,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:57:24,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:57:24,646 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:57:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:57:24,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1080899301, now seen corresponding path program 1 times [2020-07-20 22:57:24,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:57:24,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794008110] [2020-07-20 22:57:24,661 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:24,725 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:57:24,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:57:24,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:57:24,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:57:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:57:24,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:57:24,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794008110] [2020-07-20 22:57:24,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:57:24,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:57:24,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458395922] [2020-07-20 22:57:24,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:57:24,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:57:24,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:57:24,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:57:24,870 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-20 22:57:24,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:57:25,000 INFO L93 Difference]: Finished difference Result 58 states and 95 transitions. [2020-07-20 22:57:25,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:57:25,002 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 22:57:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:57:25,011 INFO L225 Difference]: With dead ends: 58 [2020-07-20 22:57:25,011 INFO L226 Difference]: Without dead ends: 31 [2020-07-20 22:57:25,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:57:25,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-20 22:57:25,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-20 22:57:25,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 22:57:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2020-07-20 22:57:25,070 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 10 [2020-07-20 22:57:25,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:57:25,071 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2020-07-20 22:57:25,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:57:25,071 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2020-07-20 22:57:25,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 22:57:25,073 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:57:25,073 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:57:25,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:25,285 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:57:25,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:57:25,287 INFO L82 PathProgramCache]: Analyzing trace with hash 725386554, now seen corresponding path program 1 times [2020-07-20 22:57:25,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:57:25,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336435521] [2020-07-20 22:57:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:25,322 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:57:25,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:57:25,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:57:25,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:57:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:57:25,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:57:25,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336435521] [2020-07-20 22:57:25,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:57:25,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:57:25,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524567012] [2020-07-20 22:57:25,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:57:25,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:57:25,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:57:25,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:57:25,382 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 5 states. [2020-07-20 22:57:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:57:25,457 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-07-20 22:57:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:57:25,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 22:57:25,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:57:25,460 INFO L225 Difference]: With dead ends: 37 [2020-07-20 22:57:25,460 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 22:57:25,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:57:25,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 22:57:25,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-20 22:57:25,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 22:57:25,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2020-07-20 22:57:25,473 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 15 [2020-07-20 22:57:25,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:57:25,474 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2020-07-20 22:57:25,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:57:25,474 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2020-07-20 22:57:25,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 22:57:25,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:57:25,475 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:57:25,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:25,691 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:57:25,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:57:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash -436292723, now seen corresponding path program 1 times [2020-07-20 22:57:25,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:57:25,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700927142] [2020-07-20 22:57:25,695 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:25,730 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:57:25,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:57:25,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 22:57:25,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:57:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 22:57:25,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:57:25,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700927142] [2020-07-20 22:57:25,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:57:25,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:57:25,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733404160] [2020-07-20 22:57:25,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:57:25,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:57:25,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:57:25,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:57:25,790 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 5 states. [2020-07-20 22:57:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:57:25,892 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2020-07-20 22:57:25,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:57:25,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-20 22:57:25,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:57:25,895 INFO L225 Difference]: With dead ends: 41 [2020-07-20 22:57:25,898 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 22:57:25,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:57:25,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 22:57:25,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 22:57:25,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 22:57:25,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-07-20 22:57:25,917 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 20 [2020-07-20 22:57:25,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:57:25,919 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-07-20 22:57:25,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:57:25,919 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-07-20 22:57:25,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 22:57:25,921 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:57:25,922 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:57:26,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:26,137 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:57:26,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:57:26,137 INFO L82 PathProgramCache]: Analyzing trace with hash -984989960, now seen corresponding path program 1 times [2020-07-20 22:57:26,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:57:26,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262978865] [2020-07-20 22:57:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:26,170 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:57:26,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:57:26,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 22:57:26,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:57:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 22:57:26,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:57:26,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:57:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 22:57:26,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262978865] [2020-07-20 22:57:26,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 22:57:26,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2020-07-20 22:57:26,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015968984] [2020-07-20 22:57:26,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:57:26,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:57:26,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:57:26,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:57:26,331 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 5 states. [2020-07-20 22:57:26,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:57:26,408 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-07-20 22:57:26,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:57:26,409 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-07-20 22:57:26,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:57:26,411 INFO L225 Difference]: With dead ends: 42 [2020-07-20 22:57:26,411 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 22:57:26,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:57:26,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 22:57:26,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-20 22:57:26,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 22:57:26,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-07-20 22:57:26,431 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 27 [2020-07-20 22:57:26,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:57:26,433 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-07-20 22:57:26,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:57:26,433 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-07-20 22:57:26,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 22:57:26,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:57:26,435 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:57:26,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:26,637 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:57:26,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:57:26,638 INFO L82 PathProgramCache]: Analyzing trace with hash -2135406385, now seen corresponding path program 2 times [2020-07-20 22:57:26,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:57:26,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720379174] [2020-07-20 22:57:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:26,672 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:57:26,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:57:26,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 22:57:26,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:57:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-20 22:57:26,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:57:26,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:57:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-20 22:57:26,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720379174] [2020-07-20 22:57:26,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:57:26,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-20 22:57:26,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794592961] [2020-07-20 22:57:26,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 22:57:26,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:57:26,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 22:57:26,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:57:26,807 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 8 states. [2020-07-20 22:57:34,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:57:34,935 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-07-20 22:57:34,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 22:57:34,936 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-07-20 22:57:34,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:57:34,940 INFO L225 Difference]: With dead ends: 74 [2020-07-20 22:57:34,940 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 22:57:34,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-07-20 22:57:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 22:57:34,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-07-20 22:57:34,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 22:57:34,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-07-20 22:57:34,980 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 32 [2020-07-20 22:57:34,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:57:34,983 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-07-20 22:57:34,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 22:57:34,983 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-07-20 22:57:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 22:57:34,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:57:34,986 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:57:35,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:35,188 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:57:35,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:57:35,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1300456723, now seen corresponding path program 3 times [2020-07-20 22:57:35,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:57:35,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332074559] [2020-07-20 22:57:35,190 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:35,231 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:57:35,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:57:35,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 22:57:35,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:57:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-07-20 22:57:35,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:57:35,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:57:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-20 22:57:35,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332074559] [2020-07-20 22:57:35,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 22:57:35,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2020-07-20 22:57:35,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012727020] [2020-07-20 22:57:35,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:57:35,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:57:35,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:57:35,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 22:57:35,454 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 5 states. [2020-07-20 22:57:35,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:57:35,563 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-07-20 22:57:35,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:57:35,563 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-07-20 22:57:35,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:57:35,565 INFO L225 Difference]: With dead ends: 76 [2020-07-20 22:57:35,565 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 22:57:35,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-20 22:57:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 22:57:35,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-07-20 22:57:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 22:57:35,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2020-07-20 22:57:35,583 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 54 [2020-07-20 22:57:35,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:57:35,584 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2020-07-20 22:57:35,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:57:35,584 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2020-07-20 22:57:35,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-07-20 22:57:35,587 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:57:35,587 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:57:35,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:35,796 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:57:35,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:57:35,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1996269958, now seen corresponding path program 4 times [2020-07-20 22:57:35,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:57:35,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995636523] [2020-07-20 22:57:35,799 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:35,855 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:57:35,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:57:35,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 22:57:35,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:57:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-20 22:57:36,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:57:36,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:57:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-07-20 22:57:36,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995636523] [2020-07-20 22:57:36,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:57:36,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 22:57:36,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919709055] [2020-07-20 22:57:36,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 22:57:36,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:57:36,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 22:57:36,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-20 22:57:36,476 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 14 states. [2020-07-20 22:57:50,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:57:50,059 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-07-20 22:57:50,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 22:57:50,061 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2020-07-20 22:57:50,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:57:50,062 INFO L225 Difference]: With dead ends: 81 [2020-07-20 22:57:50,063 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 22:57:50,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 151 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-07-20 22:57:50,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 22:57:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 22:57:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 22:57:50,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 22:57:50,065 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 83 [2020-07-20 22:57:50,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:57:50,065 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 22:57:50,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 22:57:50,065 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 22:57:50,065 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 22:57:50,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:57:50,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 22:58:03,551 WARN L193 SmtUtils]: Spent 13.05 s on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-07-20 22:58:14,384 WARN L193 SmtUtils]: Spent 10.83 s on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-07-20 22:58:24,963 WARN L193 SmtUtils]: Spent 10.58 s on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2020-07-20 22:58:35,853 WARN L193 SmtUtils]: Spent 10.89 s on a formula simplification. DAG size of input: 35 DAG size of output: 18 [2020-07-20 22:58:47,605 WARN L193 SmtUtils]: Spent 11.75 s on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-07-20 22:58:48,115 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2020-07-20 22:58:59,398 WARN L193 SmtUtils]: Spent 11.28 s on a formula simplification. DAG size of input: 53 DAG size of output: 18 [2020-07-20 22:58:59,401 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 22:58:59,401 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:58:59,401 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:58:59,401 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 22:58:59,401 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:58:59,401 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:58:59,401 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2020-07-20 22:58:59,402 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-20 22:58:59,402 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2020-07-20 22:58:59,402 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2020-07-20 22:58:59,402 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 18 45) the Hoare annotation is: true [2020-07-20 22:58:59,402 INFO L268 CegarLoopResult]: For program point L29(lines 26 38) no Hoare annotation was computed. [2020-07-20 22:58:59,402 INFO L264 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ .cse0 1) main_~t~0) (= (+ (* main_~a~0 main_~a~0) .cse0 1) main_~s~0))) [2020-07-20 22:58:59,402 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ .cse0 1) main_~t~0) (= (+ (* main_~a~0 main_~a~0) .cse0 1) main_~s~0))) [2020-07-20 22:58:59,402 INFO L264 CegarLoopResult]: At program point L27-1(line 27) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ .cse0 1) main_~t~0) (= (+ (* main_~a~0 main_~a~0) .cse0 1) main_~s~0))) [2020-07-20 22:58:59,402 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 18 45) no Hoare annotation was computed. [2020-07-20 22:58:59,403 INFO L264 CegarLoopResult]: At program point L26-2(lines 26 38) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ .cse0 1) main_~t~0) (= (+ (* main_~a~0 main_~a~0) .cse0 1) main_~s~0))) [2020-07-20 22:58:59,403 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 38) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ .cse0 1) main_~t~0) (= (+ (* main_~a~0 main_~a~0) .cse0 1) main_~s~0))) [2020-07-20 22:58:59,403 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 18 45) no Hoare annotation was computed. [2020-07-20 22:58:59,403 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-07-20 22:58:59,403 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (or (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (and (= 1 main_~s~0) (= 1 main_~t~0))) [2020-07-20 22:58:59,403 INFO L264 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (let ((.cse0 (* main_~a~0 2))) (and (= (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1) (* main_~s~0 4)) (= (+ .cse0 1) main_~t~0) (= (+ (* main_~a~0 main_~a~0) .cse0 1) main_~s~0))) [2020-07-20 22:58:59,404 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2020-07-20 22:58:59,404 INFO L268 CegarLoopResult]: For program point L11(lines 11 12) no Hoare annotation was computed. [2020-07-20 22:58:59,404 INFO L268 CegarLoopResult]: For program point L10(lines 10 13) no Hoare annotation was computed. [2020-07-20 22:58:59,404 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-20 22:58:59,404 INFO L268 CegarLoopResult]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2020-07-20 22:58:59,404 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-07-20 22:58:59,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:58:59 BoogieIcfgContainer [2020-07-20 22:58:59,421 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:58:59,423 INFO L168 Benchmark]: Toolchain (without parser) took 95514.45 ms. Allocated memory was 138.9 MB in the beginning and 245.4 MB in the end (delta: 106.4 MB). Free memory was 104.3 MB in the beginning and 192.9 MB in the end (delta: -88.6 MB). Peak memory consumption was 112.5 MB. Max. memory is 7.1 GB. [2020-07-20 22:58:59,424 INFO L168 Benchmark]: CDTParser took 0.56 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 22:58:59,424 INFO L168 Benchmark]: CACSL2BoogieTranslator took 262.72 ms. Allocated memory is still 138.9 MB. Free memory was 103.9 MB in the beginning and 94.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-20 22:58:59,425 INFO L168 Benchmark]: Boogie Preprocessor took 30.69 ms. Allocated memory is still 138.9 MB. Free memory was 94.2 MB in the beginning and 92.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 22:58:59,426 INFO L168 Benchmark]: RCFGBuilder took 358.86 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 92.8 MB in the beginning and 169.6 MB in the end (delta: -76.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 22:58:59,427 INFO L168 Benchmark]: TraceAbstraction took 94856.65 ms. Allocated memory was 202.4 MB in the beginning and 245.4 MB in the end (delta: 43.0 MB). Free memory was 168.9 MB in the beginning and 192.9 MB in the end (delta: -24.0 MB). Peak memory consumption was 113.7 MB. Max. memory is 7.1 GB. [2020-07-20 22:58:59,431 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 262.72 ms. Allocated memory is still 138.9 MB. Free memory was 103.9 MB in the beginning and 94.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.69 ms. Allocated memory is still 138.9 MB. Free memory was 94.2 MB in the beginning and 92.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 358.86 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 92.8 MB in the beginning and 169.6 MB in the end (delta: -76.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 94856.65 ms. Allocated memory was 202.4 MB in the beginning and 245.4 MB in the end (delta: 43.0 MB). Free memory was 168.9 MB in the beginning and 192.9 MB in the end (delta: -24.0 MB). Peak memory consumption was 113.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (t * t + t * 2 + 1 == s * 4 && a * 2 + 1 == t) && a * a + a * 2 + 1 == s - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25.6s, OverallIterations: 7, TraceHistogramMax: 14, AutomataDifference: 22.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 69.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 181 SDtfs, 59 SDslu, 606 SDs, 0 SdLazy, 425 SolverSat, 82 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 21.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 442 GetRequests, 383 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 49 PreInvPairs, 87 NumberOfFragments, 213 HoareAnnotationTreeSize, 49 FomulaSimplifications, 207 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 12 FomulaSimplificationsInter, 1064 FormulaSimplificationTreeSizeReductionInter, 68.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 241 NumberOfCodeBlocks, 167 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 426 ConstructedInterpolants, 0 QuantifiedInterpolants, 88399 SizeOfPredicates, 16 NumberOfNonLiveVariables, 467 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 1057/1162 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...