/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/fermat2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:51:56,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:51:56,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:51:56,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:51:56,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:51:56,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:51:56,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:51:57,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:51:57,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:51:57,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:51:57,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:51:57,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:51:57,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:51:57,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:51:57,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:51:57,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:51:57,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:51:57,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:51:57,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:51:57,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:51:57,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:51:57,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:51:57,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:51:57,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:51:57,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:51:57,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:51:57,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:51:57,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:51:57,065 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 22:51:57,088 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:51:57,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:51:57,091 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:51:57,091 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:51:57,091 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:51:57,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:51:57,092 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:51:57,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:51:57,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:51:57,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:51:57,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:51:57,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:51:57,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:51:57,095 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:51:57,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:51:57,095 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:51:57,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:51:57,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:51:57,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:51:57,096 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:51:57,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:51:57,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:51:57,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:51:57,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:51:57,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:51:57,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:51:57,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:51:57,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:51:57,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:51:57,098 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 22:51:57,499 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:51:57,521 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:51:57,527 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:51:57,529 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:51:57,529 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:51:57,530 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/fermat2.c [2020-07-20 22:51:57,616 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/044d74ff4/a9480c766b0546269ca8d2b65eda5c08/FLAG95a074933 [2020-07-20 22:51:58,122 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:51:58,123 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/fermat2.c [2020-07-20 22:51:58,133 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/044d74ff4/a9480c766b0546269ca8d2b65eda5c08/FLAG95a074933 [2020-07-20 22:51:58,446 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/044d74ff4/a9480c766b0546269ca8d2b65eda5c08 [2020-07-20 22:51:58,456 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:51:58,459 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:51:58,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:51:58,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:51:58,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:51:58,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:51:58" (1/1) ... [2020-07-20 22:51:58,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@555a1582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:51:58, skipping insertion in model container [2020-07-20 22:51:58,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:51:58" (1/1) ... [2020-07-20 22:51:58,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:51:58,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:51:58,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:51:58,767 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:51:58,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:51:58,835 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:51:58,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:51:58 WrapperNode [2020-07-20 22:51:58,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:51:58,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:51:58,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:51:58,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:51:58,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:51:58" (1/1) ... [2020-07-20 22:51:58,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:51:58" (1/1) ... [2020-07-20 22:51:58,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:51:58" (1/1) ... [2020-07-20 22:51:58,964 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:51:58" (1/1) ... [2020-07-20 22:51:58,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:51:58" (1/1) ... [2020-07-20 22:51:58,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:51:58" (1/1) ... [2020-07-20 22:51:58,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:51:58" (1/1) ... [2020-07-20 22:51:58,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:51:58,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:51:58,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:51:58,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:51:59,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:51:58" (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 22:51:59,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:51:59,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:51:59,090 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:51:59,091 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 22:51:59,091 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:51:59,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:51:59,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2020-07-20 22:51:59,091 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:51:59,091 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:51:59,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:51:59,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:51:59,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:51:59,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:51:59,336 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:51:59,336 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 22:51:59,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:51:59 BoogieIcfgContainer [2020-07-20 22:51:59,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:51:59,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:51:59,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:51:59,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:51:59,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:51:58" (1/3) ... [2020-07-20 22:51:59,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66eb7f60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:51:59, skipping insertion in model container [2020-07-20 22:51:59,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:51:58" (2/3) ... [2020-07-20 22:51:59,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66eb7f60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:51:59, skipping insertion in model container [2020-07-20 22:51:59,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:51:59" (3/3) ... [2020-07-20 22:51:59,352 INFO L109 eAbstractionObserver]: Analyzing ICFG fermat2.c [2020-07-20 22:51:59,366 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:51:59,374 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:51:59,417 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:51:59,488 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:51:59,489 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:51:59,489 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:51:59,489 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:51:59,491 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:51:59,492 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:51:59,492 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:51:59,492 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:51:59,516 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-07-20 22:51:59,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 22:51:59,523 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:51:59,524 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:51:59,525 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:51:59,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:51:59,531 INFO L82 PathProgramCache]: Analyzing trace with hash -849943384, now seen corresponding path program 1 times [2020-07-20 22:51:59,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:51:59,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865321960] [2020-07-20 22:51:59,541 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 22:51:59,625 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:51:59,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:51:59,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 22:51:59,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:51:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 22:51:59,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:51:59,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865321960] [2020-07-20 22:51:59,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:51:59,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 22:51:59,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663727666] [2020-07-20 22:51:59,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 22:51:59,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:51:59,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 22:51:59,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 22:51:59,684 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-07-20 22:51:59,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:51:59,709 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2020-07-20 22:51:59,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 22:51:59,710 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-20 22:51:59,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:51:59,719 INFO L225 Difference]: With dead ends: 50 [2020-07-20 22:51:59,720 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 22:51:59,724 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 [2020-07-20 22:51:59,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 22:51:59,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 22:51:59,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 22:51:59,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-07-20 22:51:59,767 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 21 [2020-07-20 22:51:59,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:51:59,768 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-07-20 22:51:59,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 22:51:59,768 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-07-20 22:51:59,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 22:51:59,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:51:59,771 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:51:59,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:51:59,983 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:51:59,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:51:59,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1193991140, now seen corresponding path program 1 times [2020-07-20 22:51:59,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:51:59,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57120481] [2020-07-20 22:51:59,986 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 22:52:00,047 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:52:00,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:52:00,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 22:52:00,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:52:00,139 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:52:14,769 WARN L193 SmtUtils]: Spent 10.28 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 22:52:14,773 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:52:34,468 WARN L193 SmtUtils]: Spent 12.56 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 22:52:36,538 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:52:44,766 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 [2020-07-20 22:52:46,790 WARN L860 $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 true [2020-07-20 22:52:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 22:52:46,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:52:46,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57120481] [2020-07-20 22:52:46,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:52:46,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:52:46,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664046078] [2020-07-20 22:52:46,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:52:46,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:52:46,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:52:46,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=13, Unknown=2, NotChecked=6, Total=30 [2020-07-20 22:52:46,800 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-07-20 22:53:20,874 WARN L193 SmtUtils]: Spent 33.52 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 22:53:31,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:53:31,341 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-07-20 22:53:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:53:31,349 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-07-20 22:53:31,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:53:31,352 INFO L225 Difference]: With dead ends: 32 [2020-07-20 22:53:31,352 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 22:53:31,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.2s TimeCoverageRelationStatistics Valid=13, Invalid=19, Unknown=2, NotChecked=8, Total=42 [2020-07-20 22:53:31,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 22:53:31,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-20 22:53:31,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 22:53:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-07-20 22:53:31,364 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2020-07-20 22:53:31,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:53:31,366 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-07-20 22:53:31,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:53:31,367 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-07-20 22:53:31,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 22:53:31,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:53:31,368 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] [2020-07-20 22:53:31,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:53:31,584 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:53:31,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:53:31,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1415100442, now seen corresponding path program 1 times [2020-07-20 22:53:31,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:53:31,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358247591] [2020-07-20 22:53:31,587 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 22:53:31,641 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:53:31,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:53:31,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 22:53:31,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:53:31,919 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:53:53,876 WARN L193 SmtUtils]: Spent 14.26 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 22:53:53,879 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:54:21,519 WARN L193 SmtUtils]: Spent 14.38 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 22:54:23,585 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:54:31,818 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~u~0_BEFORE_CALL_3 Int)) (and (= (mod (+ v_main_~u~0_BEFORE_CALL_3 1) (- 2)) 0) (not (= (+ (* v_main_~u~0_BEFORE_CALL_3 v_main_~u~0_BEFORE_CALL_3) 1) (+ (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_3 (- 1)) 1) (- 2)))) (* .cse0 .cse0))) (* 2 v_main_~u~0_BEFORE_CALL_3)))))) is different from false [2020-07-20 22:54:33,850 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~u~0_BEFORE_CALL_3 Int)) (and (= (mod (+ v_main_~u~0_BEFORE_CALL_3 1) (- 2)) 0) (not (= (+ (* v_main_~u~0_BEFORE_CALL_3 v_main_~u~0_BEFORE_CALL_3) 1) (+ (* 4 (let ((.cse0 (div (+ (* v_main_~u~0_BEFORE_CALL_3 (- 1)) 1) (- 2)))) (* .cse0 .cse0))) (* 2 v_main_~u~0_BEFORE_CALL_3)))))) is different from true [2020-07-20 22:54:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 22:54:33,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:54:33,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358247591] [2020-07-20 22:54:33,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:54:33,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:54:33,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040467998] [2020-07-20 22:54:33,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 22:54:33,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:54:33,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 22:54:33,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=18, Unknown=5, NotChecked=8, Total=42 [2020-07-20 22:54:33,863 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-07-20 22:54:38,271 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 22:55:15,797 WARN L193 SmtUtils]: Spent 30.86 s on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 22:55:26,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:55:26,188 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-07-20 22:55:26,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 22:55:26,194 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-07-20 22:55:26,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:55:26,195 INFO L225 Difference]: With dead ends: 36 [2020-07-20 22:55:26,195 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 22:55:26,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 77.8s TimeCoverageRelationStatistics Valid=19, Invalid=35, Unknown=6, NotChecked=12, Total=72 [2020-07-20 22:55:26,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 22:55:26,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-07-20 22:55:26,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 22:55:26,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-20 22:55:26,205 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 27 [2020-07-20 22:55:26,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:55:26,206 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-20 22:55:26,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 22:55:26,206 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-20 22:55:26,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 22:55:26,207 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:55:26,207 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] [2020-07-20 22:55:26,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:55:26,422 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:55:26,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:55:26,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1831429119, now seen corresponding path program 1 times [2020-07-20 22:55:26,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:55:26,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899996674] [2020-07-20 22:55:26,423 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 22:55:26,455 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:55:26,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:55:26,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 22:55:26,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:55:28,745 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 22:55:29,193 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 22:55:29,208 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:55:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 22:55:29,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:55:29,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:55:30,255 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 22:55:30,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:55:30,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:55:30,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 22:55:30,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899996674] [2020-07-20 22:55:30,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:55:30,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2020-07-20 22:55:30,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212205051] [2020-07-20 22:55:30,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 22:55:30,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:55:30,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 22:55:30,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-07-20 22:55:30,565 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 11 states. [2020-07-20 22:55:42,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:55:42,191 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-07-20 22:55:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 22:55:42,192 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-07-20 22:55:42,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:55:42,196 INFO L225 Difference]: With dead ends: 46 [2020-07-20 22:55:42,196 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 22:55:42,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-07-20 22:55:42,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 22:55:42,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-07-20 22:55:42,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 22:55:42,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-07-20 22:55:42,208 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2020-07-20 22:55:42,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:55:42,209 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-07-20 22:55:42,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 22:55:42,209 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-07-20 22:55:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 22:55:42,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:55:42,210 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] [2020-07-20 22:55:42,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:55:42,426 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:55:42,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:55:42,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1774170817, now seen corresponding path program 1 times [2020-07-20 22:55:42,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:55:42,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164899150] [2020-07-20 22:55:42,429 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 22:55:42,468 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:55:42,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:55:42,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 22:55:42,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:55:44,672 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 22:55:55,713 WARN L193 SmtUtils]: Spent 4.50 s on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 22:55:55,726 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:55:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 22:55:55,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:55:55,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:55:57,845 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 22:55:57,849 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 22:55:57,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:55:57,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:55:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 22:55:58,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164899150] [2020-07-20 22:55:58,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:55:58,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2020-07-20 22:55:58,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943202829] [2020-07-20 22:55:58,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 22:55:58,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:55:58,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 22:55:58,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=81, Unknown=3, NotChecked=0, Total=110 [2020-07-20 22:55:58,053 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2020-07-20 22:56:22,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:56:22,807 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-20 22:56:22,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 22:56:22,809 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2020-07-20 22:56:22,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:56:22,811 INFO L225 Difference]: With dead ends: 52 [2020-07-20 22:56:22,811 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 22:56:22,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=39, Invalid=114, Unknown=3, NotChecked=0, Total=156 [2020-07-20 22:56:22,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 22:56:22,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2020-07-20 22:56:22,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 22:56:22,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-20 22:56:22,822 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-20 22:56:22,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:56:22,822 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-20 22:56:22,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 22:56:22,822 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-20 22:56:22,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-20 22:56:22,824 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:56:22,824 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:56:23,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:56:23,030 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:56:23,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:56:23,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1738113013, now seen corresponding path program 1 times [2020-07-20 22:56:23,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:56:23,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611897452] [2020-07-20 22:56:23,032 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 22:56:23,067 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:56:23,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:56:23,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 22:56:23,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:56:23,318 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 22:56:24,282 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 22:56:24,287 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:56:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 22:56:24,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:56:25,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:56:27,310 WARN L193 SmtUtils]: Spent 900.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 22:56:27,550 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 22:56:27,621 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 22:56:27,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:56:27,626 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 22:56:28,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:56:28,018 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 22:56:28,073 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 22:56:28,106 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 22:56:28,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 22:56:28,144 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 22:56:28,209 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 22:56:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 22:56:29,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611897452] [2020-07-20 22:56:29,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:56:29,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-07-20 22:56:29,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511207448] [2020-07-20 22:56:29,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 22:56:29,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:56:29,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 22:56:29,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-20 22:56:29,010 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 12 states. [2020-07-20 22:56:33,027 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2020-07-20 22:56:36,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:56:36,913 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-20 22:56:36,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 22:56:36,914 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-07-20 22:56:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:56:36,916 INFO L225 Difference]: With dead ends: 48 [2020-07-20 22:56:36,916 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 22:56:36,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-07-20 22:56:36,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 22:56:36,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-07-20 22:56:36,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 22:56:36,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-07-20 22:56:36,927 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 35 [2020-07-20 22:56:36,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:56:36,928 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-07-20 22:56:36,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 22:56:36,928 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-07-20 22:56:36,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-20 22:56:36,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:56:36,929 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:56:37,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:56:37,131 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:56:37,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:56:37,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1479947575, now seen corresponding path program 1 times [2020-07-20 22:56:37,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:56:37,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307592761] [2020-07-20 22:56:37,133 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 22:56:39,592 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:56:39,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:56:39,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 22:56:39,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:56:39,908 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:56:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 22:56:40,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:56:40,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:56:40,532 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 22:56:40,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:56:40,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:56:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 22:56:40,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307592761] [2020-07-20 22:56:40,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:56:40,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-20 22:56:40,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873755538] [2020-07-20 22:56:40,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 22:56:40,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:56:40,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 22:56:40,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-20 22:56:40,768 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 10 states. [2020-07-20 22:56:47,600 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 22:56:47,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:56:47,849 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2020-07-20 22:56:47,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 22:56:47,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-07-20 22:56:47,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:56:47,852 INFO L225 Difference]: With dead ends: 41 [2020-07-20 22:56:47,852 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 22:56:47,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-07-20 22:56:47,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 22:56:47,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 22:56:47,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 22:56:47,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 22:56:47,854 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-07-20 22:56:47,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:56:47,854 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 22:56:47,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 22:56:47,855 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 22:56:47,855 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 22:56:48,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:56:48,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 22:57:19,261 WARN L193 SmtUtils]: Spent 31.03 s on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-07-20 22:57:47,337 WARN L193 SmtUtils]: Spent 28.07 s on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-07-20 22:57:47,439 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 1 [2020-07-20 22:58:14,554 WARN L193 SmtUtils]: Spent 27.11 s on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-07-20 22:58:14,558 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 22:58:14,558 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:58:14,558 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 22:58:14,558 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 22:58:14,558 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 22:58:14,559 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 22:58:14,559 INFO L271 CegarLoopResult]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2020-07-20 22:58:14,559 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-20 22:58:14,559 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2020-07-20 22:58:14,559 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2020-07-20 22:58:14,560 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)))) [2020-07-20 22:58:14,560 INFO L264 CegarLoopResult]: At program point L31-2(lines 31 42) the Hoare annotation is: (or (let ((.cse0 (* main_~v~0 main_~v~0))) (and (<= (div (+ .cse0 (* (- 1) main_~u~0 main_~u~0) (* 2 main_~u~0) (* (- 2) main_~v~0) (* 4 main_~A~0)) (- 4)) 0) (= (+ .cse0 (* main_~A~0 4) (* main_~r~0 4) (* main_~u~0 2)) (+ (* main_~v~0 2) (* main_~u~0 main_~u~0))) (<= 0 main_~r~0))) (let ((.cse1 (let ((.cse2 (div (+ (* main_~u~0 (- 1)) 1) (- 2)))) (* .cse2 .cse2)))) (and (= main_~A~0 .cse1) (= 1 main_~v~0) (= .cse1 (+ main_~A~0 main_~r~0)) (= 0 (mod (+ main_~u~0 1) (- 2)))))) [2020-07-20 22:58:14,560 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-07-20 22:58:14,560 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 47) no Hoare annotation was computed. [2020-07-20 22:58:14,560 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-07-20 22:58:14,561 INFO L271 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: true [2020-07-20 22:58:14,561 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 17 47) no Hoare annotation was computed. [2020-07-20 22:58:14,561 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)))) [2020-07-20 22:58:14,561 INFO L268 CegarLoopResult]: For program point L32-1(lines 31 42) no Hoare annotation was computed. [2020-07-20 22:58:14,561 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 17 47) the Hoare annotation is: true [2020-07-20 22:58:14,561 INFO L268 CegarLoopResult]: For program point L45(line 45) no Hoare annotation was computed. [2020-07-20 22:58:14,562 INFO L268 CegarLoopResult]: For program point L35(lines 35 41) no Hoare annotation was computed. [2020-07-20 22:58:14,562 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2020-07-20 22:58:14,562 INFO L268 CegarLoopResult]: For program point L11(lines 11 12) no Hoare annotation was computed. [2020-07-20 22:58:14,562 INFO L268 CegarLoopResult]: For program point L10(lines 10 13) no Hoare annotation was computed. [2020-07-20 22:58:14,562 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-20 22:58:14,562 INFO L268 CegarLoopResult]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2020-07-20 22:58:14,562 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-07-20 22:58:14,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:58:14 BoogieIcfgContainer [2020-07-20 22:58:14,580 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 22:58:14,582 INFO L168 Benchmark]: Toolchain (without parser) took 376123.98 ms. Allocated memory was 144.2 MB in the beginning and 249.0 MB in the end (delta: 104.9 MB). Free memory was 102.4 MB in the beginning and 181.9 MB in the end (delta: -79.5 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. [2020-07-20 22:58:14,583 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 22:58:14,583 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.14 ms. Allocated memory is still 144.2 MB. Free memory was 102.0 MB in the beginning and 91.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-20 22:58:14,584 INFO L168 Benchmark]: Boogie Preprocessor took 159.25 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 91.8 MB in the beginning and 178.9 MB in the end (delta: -87.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 22:58:14,585 INFO L168 Benchmark]: RCFGBuilder took 343.42 ms. Allocated memory is still 200.8 MB. Free memory was 178.9 MB in the beginning and 165.4 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-20 22:58:14,586 INFO L168 Benchmark]: TraceAbstraction took 375237.66 ms. Allocated memory was 200.8 MB in the beginning and 249.0 MB in the end (delta: 48.2 MB). Free memory was 164.7 MB in the beginning and 181.9 MB in the end (delta: -17.2 MB). Peak memory consumption was 31.0 MB. Max. memory is 7.1 GB. [2020-07-20 22:58:14,589 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 377.14 ms. Allocated memory is still 144.2 MB. Free memory was 102.0 MB in the beginning and 91.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 159.25 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 91.8 MB in the beginning and 178.9 MB in the end (delta: -87.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 343.42 ms. Allocated memory is still 200.8 MB. Free memory was 178.9 MB in the beginning and 165.4 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 375237.66 ms. Allocated memory was 200.8 MB in the beginning and 249.0 MB in the end (delta: 48.2 MB). Free memory was 164.7 MB in the beginning and 181.9 MB in the end (delta: -17.2 MB). Peak memory consumption was 31.0 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: 288.5s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 148.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 86.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 167 SDtfs, 68 SDslu, 640 SDs, 0 SdLazy, 414 SolverSat, 13 SolverUnsat, 33 SolverUnknown, 0 SolverNotchecked, 74.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 332 GetRequests, 258 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 164.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred 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: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 34 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 21 PreInvPairs, 33 NumberOfFragments, 206 HoareAnnotationTreeSize, 21 FomulaSimplifications, 948 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 803 FormulaSimplificationTreeSizeReductionInter, 86.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 135.7s InterpolantComputationTime, 197 NumberOfCodeBlocks, 130 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 314 ConstructedInterpolants, 12 QuantifiedInterpolants, 44882 SizeOfPredicates, 34 NumberOfNonLiveVariables, 335 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 88/106 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...