/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/fermat2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:09:36,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:09:36,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:09:36,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:09:36,605 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:09:36,606 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:09:36,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:09:36,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:09:36,610 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:09:36,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:09:36,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:09:36,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:09:36,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:09:36,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:09:36,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:09:36,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:09:36,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:09:36,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:09:36,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:09:36,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:09:36,623 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:09:36,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:09:36,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:09:36,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:09:36,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:09:36,636 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:09:36,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:09:36,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:09:36,638 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 12:09:36,660 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:09:36,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:09:36,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:09:36,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:09:36,662 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:09:36,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:09:36,663 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:09:36,663 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:09:36,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:09:36,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:09:36,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:09:36,664 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:09:36,664 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:09:36,664 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:09:36,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:09:36,664 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:09:36,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:09:36,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:09:36,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:09:36,665 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:09:36,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:09:36,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:09:36,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:09:36,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:09:36,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:09:36,667 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:09:36,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:36,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:09:36,668 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:09:36,668 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 -> NOT_INCREMENTALLY [2020-07-21 12:09:36,997 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:09:37,010 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:09:37,013 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:09:37,014 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:09:37,014 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:09:37,015 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/fermat2.c [2020-07-21 12:09:37,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3855533aa/1b0584064efa43e59d080f6487db346e/FLAG9b6744bd9 [2020-07-21 12:09:37,517 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:09:37,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/fermat2.c [2020-07-21 12:09:37,524 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3855533aa/1b0584064efa43e59d080f6487db346e/FLAG9b6744bd9 [2020-07-21 12:09:37,928 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3855533aa/1b0584064efa43e59d080f6487db346e [2020-07-21 12:09:37,938 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:09:37,942 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:09:37,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:09:37,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:09:37,946 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:09:37,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:09:37" (1/1) ... [2020-07-21 12:09:37,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e98de96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:37, skipping insertion in model container [2020-07-21 12:09:37,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:09:37" (1/1) ... [2020-07-21 12:09:37,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:09:37,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:09:38,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:09:38,153 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:09:38,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:09:38,189 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:09:38,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:38 WrapperNode [2020-07-21 12:09:38,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:09:38,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:09:38,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:09:38,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:09:38,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:38" (1/1) ... [2020-07-21 12:09:38,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:38" (1/1) ... [2020-07-21 12:09:38,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:38" (1/1) ... [2020-07-21 12:09:38,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:38" (1/1) ... [2020-07-21 12:09:38,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:38" (1/1) ... [2020-07-21 12:09:38,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:38" (1/1) ... [2020-07-21 12:09:38,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:38" (1/1) ... [2020-07-21 12:09:38,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:09:38,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:09:38,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:09:38,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:09:38,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:38" (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 12:09:38,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:09:38,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:09:38,425 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:09:38,425 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 12:09:38,425 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:09:38,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:09:38,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-07-21 12:09:38,426 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:09:38,426 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:09:38,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 12:09:38,427 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:09:38,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:09:38,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:09:38,632 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:09:38,632 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 12:09:38,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:09:38 BoogieIcfgContainer [2020-07-21 12:09:38,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:09:38,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:09:38,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:09:38,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:09:38,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:09:37" (1/3) ... [2020-07-21 12:09:38,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c23172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:09:38, skipping insertion in model container [2020-07-21 12:09:38,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:09:38" (2/3) ... [2020-07-21 12:09:38,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c23172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:09:38, skipping insertion in model container [2020-07-21 12:09:38,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:09:38" (3/3) ... [2020-07-21 12:09:38,644 INFO L109 eAbstractionObserver]: Analyzing ICFG fermat2.c [2020-07-21 12:09:38,655 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:09:38,662 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:09:38,677 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:09:38,731 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:09:38,731 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:09:38,732 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:09:38,732 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:09:38,732 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:09:38,732 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:09:38,732 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:09:38,733 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:09:38,764 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-21 12:09:38,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 12:09:38,772 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:09:38,773 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:09:38,774 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:09:38,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:09:38,780 INFO L82 PathProgramCache]: Analyzing trace with hash -849943384, now seen corresponding path program 1 times [2020-07-21 12:09:38,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:09:38,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617340485] [2020-07-21 12:09:38,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:09:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:09:38,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 12:09:38,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:09:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 12:09:38,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:09:38,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617340485] [2020-07-21 12:09:38,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:09:38,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 12:09:38,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762282762] [2020-07-21 12:09:38,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 12:09:38,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:09:38,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 12:09:38,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 12:09:38,910 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-07-21 12:09:38,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:09:38,936 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-07-21 12:09:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 12:09:38,938 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-21 12:09:38,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:09:38,947 INFO L225 Difference]: With dead ends: 50 [2020-07-21 12:09:38,948 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 12:09:38,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 12:09:38,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 12:09:38,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-21 12:09:38,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 12:09:38,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-07-21 12:09:38,993 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2020-07-21 12:09:38,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:09:38,994 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-07-21 12:09:38,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 12:09:38,995 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-07-21 12:09:38,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 12:09:38,997 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:09:38,997 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:09:39,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:39,213 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:09:39,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:09:39,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1193991140, now seen corresponding path program 1 times [2020-07-21 12:09:39,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:09:39,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7466276] [2020-07-21 12:09:39,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:09:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:09:39,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 12:09:39,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:09:39,342 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:09:53,927 WARN L193 SmtUtils]: Spent 10.19 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 12:09:53,932 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:10:02,145 WARN L838 $PredicateComparison]: unable to prove that (or (<= 1 c___VERIFIER_assert_~cond) (and (<= 0 c___VERIFIER_assert_~cond) (exists ((v_main_~u~0_BEFORE_CALL_1 Int)) (and (not (= (+ (* 2 v_main_~u~0_BEFORE_CALL_1) (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_1 (- 1)) 1) (- 2)))) (* .cse0 .cse0)))) (+ (* v_main_~u~0_BEFORE_CALL_1 v_main_~u~0_BEFORE_CALL_1) 1))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_1 1) (- 2))))))) is different from false [2020-07-21 12:10:04,172 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:10:12,407 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~u~0_BEFORE_CALL_1 Int)) (and (not (= (+ (* 2 v_main_~u~0_BEFORE_CALL_1) (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_1 (- 1)) 1) (- 2)))) (* .cse0 .cse0)))) (+ (* v_main_~u~0_BEFORE_CALL_1 v_main_~u~0_BEFORE_CALL_1) 1))) (= 0 (mod (+ v_main_~u~0_BEFORE_CALL_1 1) (- 2))))) is different from false [2020-07-21 12:10:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:10:12,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:10:12,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7466276] [2020-07-21 12:10:12,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:10:12,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:10:12,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755383957] [2020-07-21 12:10:12,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 12:10:12,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:10:12,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 12:10:12,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=9, Unknown=2, NotChecked=10, Total=30 [2020-07-21 12:10:12,435 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-07-21 12:10:45,676 WARN L193 SmtUtils]: Spent 30.11 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 12:10:56,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:10:56,752 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-07-21 12:10:56,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:10:56,757 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-07-21 12:10:56,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:10:56,759 INFO L225 Difference]: With dead ends: 34 [2020-07-21 12:10:56,759 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 12:10:56,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=12, Invalid=14, Unknown=2, NotChecked=14, Total=42 [2020-07-21 12:10:56,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 12:10:56,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-07-21 12:10:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 12:10:56,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-21 12:10:56,770 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2020-07-21 12:10:56,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:10:56,772 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-21 12:10:56,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 12:10:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-21 12:10:56,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 12:10:56,774 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:10:56,775 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:10:56,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:10:56,982 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:10:56,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:10:56,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1415100442, now seen corresponding path program 1 times [2020-07-21 12:10:56,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:10:56,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401405892] [2020-07-21 12:10:56,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:10:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:10:57,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 12:10:57,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:10:57,117 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:10:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:10:57,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:10:57,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:10:57,745 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 12:10:57,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:10:57,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:10:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:10:57,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401405892] [2020-07-21 12:10:57,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:10:57,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-21 12:10:57,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779046812] [2020-07-21 12:10:57,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 12:10:57,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:10:57,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 12:10:57,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-21 12:10:57,955 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 10 states. [2020-07-21 12:11:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:11:04,527 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-07-21 12:11:04,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:11:04,533 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 12:11:04,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:11:04,536 INFO L225 Difference]: With dead ends: 35 [2020-07-21 12:11:04,536 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 12:11:04,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-07-21 12:11:04,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 12:11:04,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 12:11:04,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 12:11:04,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-21 12:11:04,553 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 27 [2020-07-21 12:11:04,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:11:04,554 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-21 12:11:04,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 12:11:04,554 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-21 12:11:04,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 12:11:04,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:11:04,556 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:11:04,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:11:04,771 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:11:04,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:11:04,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1831429119, now seen corresponding path program 1 times [2020-07-21 12:11:04,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:11:04,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290741156] [2020-07-21 12:11:04,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:11:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:11:04,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 12:11:04,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:11:05,375 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 12:11:05,394 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 12:11:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:11:05,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:11:05,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:11:08,128 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-21 12:11:08,191 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 12:11:08,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:11:08,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:11:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:11:08,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290741156] [2020-07-21 12:11:08,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:11:08,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2020-07-21 12:11:08,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575843902] [2020-07-21 12:11:08,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 12:11:08,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:11:08,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 12:11:08,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-07-21 12:11:08,431 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 11 states. [2020-07-21 12:11:19,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:11:19,299 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-07-21 12:11:19,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 12:11:19,300 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-07-21 12:11:19,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:11:19,302 INFO L225 Difference]: With dead ends: 44 [2020-07-21 12:11:19,303 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 12:11:19,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-07-21 12:11:19,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 12:11:19,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2020-07-21 12:11:19,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 12:11:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-21 12:11:19,312 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 29 [2020-07-21 12:11:19,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:11:19,312 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-21 12:11:19,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 12:11:19,313 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-21 12:11:19,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 12:11:19,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:11:19,314 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:11:19,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:11:19,530 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:11:19,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:11:19,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1774170817, now seen corresponding path program 1 times [2020-07-21 12:11:19,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:11:19,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80596062] [2020-07-21 12:11:19,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:11:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:11:19,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 12:11:19,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:11:30,175 WARN L193 SmtUtils]: Spent 8.31 s on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 12:11:45,054 WARN L193 SmtUtils]: Spent 6.52 s on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 12:11:45,062 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 12:11:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:11:45,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:11:45,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:11:50,580 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-21 12:11:50,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:11:50,589 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:11:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 12:11:50,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80596062] [2020-07-21 12:11:50,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:11:50,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2020-07-21 12:11:50,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351626173] [2020-07-21 12:11:50,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 12:11:50,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:11:50,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 12:11:50,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=78, Unknown=6, NotChecked=0, Total=110 [2020-07-21 12:11:50,794 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 11 states. [2020-07-21 12:12:19,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:12:19,319 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-07-21 12:12:19,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 12:12:19,320 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-07-21 12:12:19,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:12:19,321 INFO L225 Difference]: With dead ends: 42 [2020-07-21 12:12:19,321 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 12:12:19,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=39, Invalid=111, Unknown=6, NotChecked=0, Total=156 [2020-07-21 12:12:19,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 12:12:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 12:12:19,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 12:12:19,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 12:12:19,323 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-07-21 12:12:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:12:19,324 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 12:12:19,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 12:12:19,324 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 12:12:19,324 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 12:12:19,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:12:19,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 12:12:46,350 WARN L193 SmtUtils]: Spent 26.69 s on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2020-07-21 12:12:48,506 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 35 DAG size of output: 1 [2020-07-21 12:13:17,969 WARN L193 SmtUtils]: Spent 29.46 s on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2020-07-21 12:13:17,972 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 12:13:17,972 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:13:17,972 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 12:13:17,973 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 12:13:17,973 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 12:13:17,973 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 12:13:17,973 INFO L271 CegarLoopResult]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2020-07-21 12:13:17,973 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-21 12:13:17,973 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2020-07-21 12:13:17,973 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2020-07-21 12:13:17,973 INFO L264 CegarLoopResult]: At program point L35-2(lines 31 42) the Hoare annotation is: (or (and (= 1 main_~v~0) (= (let ((.cse0 (div (+ (* main_~u~0 (- 1)) 1) (- 2)))) (* .cse0 .cse0)) (+ main_~A~0 main_~r~0)) (= 0 (mod (+ main_~u~0 1) (- 2)))) (= (+ (* main_~v~0 main_~v~0) (* main_~A~0 4) (* main_~r~0 4) (* main_~u~0 2)) (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)))) [2020-07-21 12:13:17,973 INFO L264 CegarLoopResult]: At program point L31-2(lines 31 42) the Hoare annotation is: (let ((.cse0 (+ (* main_~u~0 main_~u~0) (* 2 main_~v~0))) (.cse1 (* main_~v~0 main_~v~0)) (.cse2 (* 2 main_~u~0)) (.cse3 (* 4 main_~A~0))) (and (= .cse0 (+ .cse1 .cse2 .cse3)) (= .cse0 (+ .cse1 .cse2 (* 4 main_~r~0) .cse3)))) [2020-07-21 12:13:17,974 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-07-21 12:13:17,974 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 47) no Hoare annotation was computed. [2020-07-21 12:13:17,974 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-07-21 12:13:17,974 INFO L271 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: true [2020-07-21 12:13:17,974 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 47) no Hoare annotation was computed. [2020-07-21 12:13:17,974 INFO L264 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: (or (and (= 1 main_~v~0) (= (let ((.cse0 (div (+ (* main_~u~0 (- 1)) 1) (- 2)))) (* .cse0 .cse0)) (+ main_~A~0 main_~r~0)) (= 0 (mod (+ main_~u~0 1) (- 2)))) (= (+ (* main_~v~0 main_~v~0) (* main_~A~0 4) (* main_~r~0 4) (* main_~u~0 2)) (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)))) [2020-07-21 12:13:17,974 INFO L268 CegarLoopResult]: For program point L32-1(lines 31 42) no Hoare annotation was computed. [2020-07-21 12:13:17,974 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 17 47) the Hoare annotation is: true [2020-07-21 12:13:17,975 INFO L268 CegarLoopResult]: For program point L45(line 45) no Hoare annotation was computed. [2020-07-21 12:13:17,975 INFO L268 CegarLoopResult]: For program point L35(lines 35 41) no Hoare annotation was computed. [2020-07-21 12:13:17,975 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2020-07-21 12:13:17,975 INFO L268 CegarLoopResult]: For program point L11(lines 11 12) no Hoare annotation was computed. [2020-07-21 12:13:17,975 INFO L268 CegarLoopResult]: For program point L10(lines 10 13) no Hoare annotation was computed. [2020-07-21 12:13:17,975 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-21 12:13:17,975 INFO L268 CegarLoopResult]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2020-07-21 12:13:17,975 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-07-21 12:13:17,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:13:17 BoogieIcfgContainer [2020-07-21 12:13:17,995 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 12:13:17,998 INFO L168 Benchmark]: Toolchain (without parser) took 220056.48 ms. Allocated memory was 138.9 MB in the beginning and 243.8 MB in the end (delta: 104.9 MB). Free memory was 103.2 MB in the beginning and 184.6 MB in the end (delta: -81.3 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-07-21 12:13:18,002 INFO L168 Benchmark]: CDTParser took 0.20 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. [2020-07-21 12:13:18,003 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.94 ms. Allocated memory is still 138.9 MB. Free memory was 103.0 MB in the beginning and 93.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 12:13:18,007 INFO L168 Benchmark]: Boogie Preprocessor took 162.73 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 93.1 MB in the beginning and 180.6 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-21 12:13:18,008 INFO L168 Benchmark]: RCFGBuilder took 279.74 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 167.1 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-21 12:13:18,009 INFO L168 Benchmark]: TraceAbstraction took 219357.32 ms. Allocated memory was 202.4 MB in the beginning and 243.8 MB in the end (delta: 41.4 MB). Free memory was 167.1 MB in the beginning and 184.6 MB in the end (delta: -17.5 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-07-21 12:13:18,017 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 247.94 ms. Allocated memory is still 138.9 MB. Free memory was 103.0 MB in the beginning and 93.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 162.73 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 93.1 MB in the beginning and 180.6 MB in the end (delta: -87.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 279.74 ms. Allocated memory is still 202.4 MB. Free memory was 180.6 MB in the beginning and 167.1 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 219357.32 ms. Allocated memory was 202.4 MB in the beginning and 243.8 MB in the end (delta: 41.4 MB). Free memory was 167.1 MB in the beginning and 184.6 MB in the end (delta: -17.5 MB). Peak memory consumption was 24.0 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: 31]: Loop Invariant Derived loop invariant: ((1 == v && (u * -1 + 1) / -2 * ((u * -1 + 1) / -2) == A + r) && 0 == (u + 1) % -2) || v * v + A * 4 + r * 4 + u * 2 == v * 2 + u * u - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 160.8s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 90.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 58.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 113 SDtfs, 42 SDslu, 393 SDs, 0 SdLazy, 249 SolverSat, 10 SolverUnsat, 25 SolverUnknown, 0 SolverNotchecked, 56.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 215 GetRequests, 167 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 79.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=2, 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, 5 MinimizatonAttempts, 17 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 20 PreInvPairs, 32 NumberOfFragments, 152 HoareAnnotationTreeSize, 20 FomulaSimplifications, 434 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 261 FormulaSimplificationTreeSizeReductionInter, 58.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 68.9s InterpolantComputationTime, 127 NumberOfCodeBlocks, 127 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 204 ConstructedInterpolants, 3 QuantifiedInterpolants, 28290 SizeOfPredicates, 21 NumberOfNonLiveVariables, 268 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 42/52 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...