/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 NUM_VARIABLES --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/loops-crafted-1/sumt4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 18:13:34,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 18:13:34,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 18:13:34,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 18:13:34,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 18:13:34,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 18:13:34,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 18:13:34,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 18:13:34,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 18:13:34,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 18:13:34,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 18:13:34,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 18:13:34,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 18:13:34,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 18:13:34,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 18:13:34,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 18:13:34,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 18:13:34,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 18:13:34,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 18:13:34,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 18:13:34,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 18:13:34,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 18:13:34,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 18:13:34,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 18:13:34,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 18:13:34,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 18:13:34,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 18:13:34,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 18:13:34,579 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 18:13:34,610 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 18:13:34,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 18:13:34,611 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 18:13:34,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 18:13:34,620 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 18:13:34,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 18:13:34,620 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 18:13:34,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 18:13:34,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 18:13:34,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 18:13:34,621 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 18:13:34,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 18:13:34,621 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 18:13:34,621 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 18:13:34,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 18:13:34,622 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 18:13:34,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 18:13:34,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 18:13:34,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 18:13:34,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 18:13:34,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 18:13:34,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:13:34,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 18:13:34,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 18:13:34,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 18:13:34,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 18:13:34,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:13:34,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 18:13:34,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 18:13:34,625 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 -> NUM_VARIABLES 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 18:13:34,900 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 18:13:34,913 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 18:13:34,916 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 18:13:34,918 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 18:13:34,918 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 18:13:34,919 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-07-20 18:13:34,980 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfa404fd2/cc9f55cd95354c5da3fd7ec273b8c0c1/FLAG72a46e1ad [2020-07-20 18:13:35,390 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 18:13:35,391 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-07-20 18:13:35,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfa404fd2/cc9f55cd95354c5da3fd7ec273b8c0c1/FLAG72a46e1ad [2020-07-20 18:13:35,735 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cfa404fd2/cc9f55cd95354c5da3fd7ec273b8c0c1 [2020-07-20 18:13:35,744 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 18:13:35,747 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 18:13:35,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 18:13:35,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 18:13:35,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 18:13:35,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:13:35" (1/1) ... [2020-07-20 18:13:35,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65343b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:35, skipping insertion in model container [2020-07-20 18:13:35,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:13:35" (1/1) ... [2020-07-20 18:13:35,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 18:13:35,783 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 18:13:35,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:13:35,940 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 18:13:35,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:13:35,974 INFO L208 MainTranslator]: Completed translation [2020-07-20 18:13:35,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:35 WrapperNode [2020-07-20 18:13:35,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 18:13:35,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 18:13:35,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 18:13:35,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 18:13:35,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:35" (1/1) ... [2020-07-20 18:13:35,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:35" (1/1) ... [2020-07-20 18:13:35,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:35" (1/1) ... [2020-07-20 18:13:35,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:35" (1/1) ... [2020-07-20 18:13:35,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:35" (1/1) ... [2020-07-20 18:13:35,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:35" (1/1) ... [2020-07-20 18:13:35,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:35" (1/1) ... [2020-07-20 18:13:36,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 18:13:36,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 18:13:36,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 18:13:36,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 18:13:36,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:35" (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 18:13:36,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 18:13:36,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 18:13:36,150 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 18:13:36,150 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 18:13:36,150 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 18:13:36,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 18:13:36,150 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 18:13:36,150 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 18:13:36,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 18:13:36,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 18:13:36,151 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 18:13:36,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 18:13:36,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 18:13:36,368 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 18:13:36,368 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 18:13:36,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:13:36 BoogieIcfgContainer [2020-07-20 18:13:36,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 18:13:36,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 18:13:36,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 18:13:36,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 18:13:36,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:13:35" (1/3) ... [2020-07-20 18:13:36,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305fc283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:13:36, skipping insertion in model container [2020-07-20 18:13:36,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:35" (2/3) ... [2020-07-20 18:13:36,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305fc283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:13:36, skipping insertion in model container [2020-07-20 18:13:36,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:13:36" (3/3) ... [2020-07-20 18:13:36,381 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt4.c [2020-07-20 18:13:36,389 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 18:13:36,396 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 18:13:36,411 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 18:13:36,432 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 18:13:36,433 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 18:13:36,433 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 18:13:36,433 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 18:13:36,433 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 18:13:36,433 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 18:13:36,433 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 18:13:36,434 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 18:13:36,453 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 18:13:36,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 18:13:36,459 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:13:36,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:13:36,461 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:13:36,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:13:36,467 INFO L82 PathProgramCache]: Analyzing trace with hash -12471351, now seen corresponding path program 1 times [2020-07-20 18:13:36,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:13:36,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206501494] [2020-07-20 18:13:36,477 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 18:13:36,550 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 18:13:36,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:13:36,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 18:13:36,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:13:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:13:36,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:13:36,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206501494] [2020-07-20 18:13:36,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:13:36,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 18:13:36,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502960150] [2020-07-20 18:13:36,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 18:13:36,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:13:36,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 18:13:36,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:13:36,717 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-20 18:13:36,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:13:36,831 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2020-07-20 18:13:36,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 18:13:36,833 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-20 18:13:36,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:13:36,843 INFO L225 Difference]: With dead ends: 51 [2020-07-20 18:13:36,843 INFO L226 Difference]: Without dead ends: 19 [2020-07-20 18:13:36,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 18:13:36,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-20 18:13:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-20 18:13:36,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-20 18:13:36,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-07-20 18:13:36,882 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2020-07-20 18:13:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:13:36,882 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-07-20 18:13:36,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 18:13:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-07-20 18:13:36,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 18:13:36,884 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:13:36,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:13:37,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:13:37,098 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:13:37,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:13:37,098 INFO L82 PathProgramCache]: Analyzing trace with hash -793409467, now seen corresponding path program 1 times [2020-07-20 18:13:37,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:13:37,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980462761] [2020-07-20 18:13:37,099 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 18:13:37,149 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 18:13:37,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:13:37,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 18:13:37,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:13:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:13:37,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:13:37,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 18:13:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:13:37,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980462761] [2020-07-20 18:13:37,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:13:37,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 18:13:37,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970007080] [2020-07-20 18:13:37,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 18:13:37,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:13:37,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 18:13:37,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-20 18:13:37,649 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 14 states. [2020-07-20 18:13:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:13:40,014 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2020-07-20 18:13:40,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 18:13:40,016 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2020-07-20 18:13:40,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:13:40,017 INFO L225 Difference]: With dead ends: 40 [2020-07-20 18:13:40,017 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 18:13:40,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-07-20 18:13:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 18:13:40,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-20 18:13:40,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 18:13:40,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-07-20 18:13:40,026 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 15 [2020-07-20 18:13:40,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:13:40,026 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-07-20 18:13:40,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 18:13:40,027 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-07-20 18:13:40,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 18:13:40,028 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:13:40,028 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:13:40,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:13:40,242 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:13:40,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:13:40,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1087804450, now seen corresponding path program 1 times [2020-07-20 18:13:40,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:13:40,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841540026] [2020-07-20 18:13:40,246 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 18:13:40,280 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:13:40,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:13:40,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 18:13:40,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:13:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:13:40,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:13:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:13:40,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841540026] [2020-07-20 18:13:40,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:13:40,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 18:13:40,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460406872] [2020-07-20 18:13:40,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 18:13:40,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:13:40,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 18:13:40,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-20 18:13:40,379 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states. [2020-07-20 18:13:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:13:40,634 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2020-07-20 18:13:40,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 18:13:40,635 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-07-20 18:13:40,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:13:40,637 INFO L225 Difference]: With dead ends: 60 [2020-07-20 18:13:40,637 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 18:13:40,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-07-20 18:13:40,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 18:13:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2020-07-20 18:13:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 18:13:40,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2020-07-20 18:13:40,649 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 23 [2020-07-20 18:13:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:13:40,650 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2020-07-20 18:13:40,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 18:13:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2020-07-20 18:13:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 18:13:40,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:13:40,651 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:13:40,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:13:40,866 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:13:40,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:13:40,867 INFO L82 PathProgramCache]: Analyzing trace with hash -563580765, now seen corresponding path program 1 times [2020-07-20 18:13:40,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:13:40,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169659482] [2020-07-20 18:13:40,868 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 18:13:40,922 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 18:13:40,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:13:40,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 18:13:40,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:13:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:13:41,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:13:41,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 18:13:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 18:13:43,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169659482] [2020-07-20 18:13:43,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 18:13:43,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 13 [2020-07-20 18:13:43,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331554129] [2020-07-20 18:13:43,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 18:13:43,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:13:43,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 18:13:43,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-07-20 18:13:43,178 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand 6 states. [2020-07-20 18:13:51,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:13:51,500 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2020-07-20 18:13:51,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 18:13:51,502 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-07-20 18:13:51,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:13:51,503 INFO L225 Difference]: With dead ends: 63 [2020-07-20 18:13:51,504 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 18:13:51,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-07-20 18:13:51,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 18:13:51,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-07-20 18:13:51,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-20 18:13:51,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2020-07-20 18:13:51,532 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 25 [2020-07-20 18:13:51,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:13:51,532 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2020-07-20 18:13:51,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 18:13:51,535 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2020-07-20 18:13:51,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 18:13:51,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:13:51,536 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:13:51,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:13:51,753 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:13:51,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:13:51,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1723884779, now seen corresponding path program 1 times [2020-07-20 18:13:51,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:13:51,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837430158] [2020-07-20 18:13:51,755 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 18:13:51,797 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 18:13:51,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:13:51,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-20 18:13:51,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:13:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:13:52,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:13:52,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 18:13:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:13:58,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837430158] [2020-07-20 18:13:58,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:13:58,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2020-07-20 18:13:58,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032013867] [2020-07-20 18:13:58,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 18:13:58,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:13:58,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 18:13:58,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=449, Unknown=3, NotChecked=0, Total=552 [2020-07-20 18:13:58,928 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 24 states. [2020-07-20 18:14:05,794 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 18:14:12,360 WARN L193 SmtUtils]: Spent 4.29 s on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 18:14:28,869 WARN L193 SmtUtils]: Spent 8.24 s on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 18:14:57,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:14:57,402 INFO L93 Difference]: Finished difference Result 126 states and 175 transitions. [2020-07-20 18:14:57,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 18:14:57,402 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 29 [2020-07-20 18:14:57,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:14:57,405 INFO L225 Difference]: With dead ends: 126 [2020-07-20 18:14:57,405 INFO L226 Difference]: Without dead ends: 86 [2020-07-20 18:14:57,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 43.5s TimeCoverageRelationStatistics Valid=184, Invalid=798, Unknown=10, NotChecked=0, Total=992 [2020-07-20 18:14:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-20 18:14:57,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-07-20 18:14:57,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-07-20 18:14:57,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2020-07-20 18:14:57,419 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 29 [2020-07-20 18:14:57,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:14:57,419 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2020-07-20 18:14:57,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 18:14:57,419 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2020-07-20 18:14:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-20 18:14:57,421 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:14:57,421 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:14:57,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:14:57,622 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:14:57,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:14:57,623 INFO L82 PathProgramCache]: Analyzing trace with hash 799765411, now seen corresponding path program 2 times [2020-07-20 18:14:57,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:14:57,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399439880] [2020-07-20 18:14:57,625 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 18:14:57,665 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:14:57,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:14:57,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 18:14:57,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:14:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 70 proven. 47 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 18:14:57,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:15:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 70 proven. 38 refuted. 9 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 18:15:24,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399439880] [2020-07-20 18:15:24,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:15:24,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 18:15:24,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477513009] [2020-07-20 18:15:24,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 18:15:24,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:15:24,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 18:15:24,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=120, Unknown=13, NotChecked=0, Total=182 [2020-07-20 18:15:24,635 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand 14 states. [2020-07-20 18:15:26,872 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 5) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 3) 4294967296))) is different from false [2020-07-20 18:15:28,935 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 3) 4294967296))) is different from false [2020-07-20 18:15:59,835 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 3) 4294967296))) is different from false [2020-07-20 18:16:06,019 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 3) 4294967296))) is different from false [2020-07-20 18:16:34,835 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 3) 4294967296))) is different from false [2020-07-20 18:16:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:16:57,416 INFO L93 Difference]: Finished difference Result 145 states and 189 transitions. [2020-07-20 18:16:57,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 18:16:57,475 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-07-20 18:16:57,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:16:57,476 INFO L225 Difference]: With dead ends: 145 [2020-07-20 18:16:57,476 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 18:16:57,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 37.3s TimeCoverageRelationStatistics Valid=59, Invalid=125, Unknown=18, NotChecked=140, Total=342 [2020-07-20 18:16:57,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 18:16:57,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2020-07-20 18:16:57,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-20 18:16:57,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2020-07-20 18:16:57,495 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 47 [2020-07-20 18:16:57,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:16:57,495 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2020-07-20 18:16:57,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 18:16:57,496 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2020-07-20 18:16:57,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 18:16:57,497 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:16:57,498 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:16:57,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:16:57,703 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:16:57,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:16:57,704 INFO L82 PathProgramCache]: Analyzing trace with hash 570122158, now seen corresponding path program 3 times [2020-07-20 18:16:57,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:16:57,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196178536] [2020-07-20 18:16:57,705 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 18:16:57,760 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:16:57,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:16:57,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 18:16:57,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:16:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 38 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 18:16:57,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:17:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 38 proven. 72 refuted. 23 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 18:17:55,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196178536] [2020-07-20 18:17:55,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:17:55,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-20 18:17:55,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390891830] [2020-07-20 18:17:55,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 18:17:55,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:17:55,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 18:17:55,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=202, Unknown=28, NotChecked=0, Total=306 [2020-07-20 18:17:55,667 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand 18 states. [2020-07-20 18:17:57,918 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 5) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 6) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 3) 4294967296))) is different from false [2020-07-20 18:17:59,969 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 5) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 6) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 3) 4294967296))) is different from false [2020-07-20 18:18:04,081 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 5) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 6) 4294967296) 3) 4294967296))) is different from false [2020-07-20 18:18:10,267 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 6) 4294967296) 3) 4294967296))) is different from false [2020-07-20 18:18:18,519 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 5) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 3) 4294967296))) is different from false [2020-07-20 18:18:32,917 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 3) 4294967296))) is different from false [2020-07-20 18:19:14,328 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 3) 4294967296))) is different from false [2020-07-20 18:19:56,298 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 3) 4294967296))) is different from false [2020-07-20 18:21:06,165 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 3) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 3) 4294967296))) is different from false [2020-07-20 18:21:25,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:21:25,302 INFO L93 Difference]: Finished difference Result 182 states and 252 transitions. [2020-07-20 18:21:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 18:21:25,304 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 48 [2020-07-20 18:21:25,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:21:25,306 INFO L225 Difference]: With dead ends: 182 [2020-07-20 18:21:25,306 INFO L226 Difference]: Without dead ends: 131 [2020-07-20 18:21:25,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 77.1s TimeCoverageRelationStatistics Valid=94, Invalid=211, Unknown=37, NotChecked=360, Total=702 [2020-07-20 18:21:25,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-07-20 18:21:25,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 121. [2020-07-20 18:21:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-20 18:21:25,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 162 transitions. [2020-07-20 18:21:25,321 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 162 transitions. Word has length 48 [2020-07-20 18:21:25,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:21:25,321 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 162 transitions. [2020-07-20 18:21:25,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 18:21:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 162 transitions. [2020-07-20 18:21:25,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 18:21:25,323 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:21:25,323 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:21:25,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:21:25,538 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:21:25,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:21:25,539 INFO L82 PathProgramCache]: Analyzing trace with hash 958974631, now seen corresponding path program 4 times [2020-07-20 18:21:25,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:21:25,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835961142] [2020-07-20 18:21:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:21:25,590 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 18:21:25,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:21:25,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 49 conjunts are in the unsatisfiable core [2020-07-20 18:21:25,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:21:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:21:26,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:21:26,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 18:22:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 0 refuted. 65 times theorem prover too weak. 61 trivial. 0 not checked. [2020-07-20 18:22:08,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835961142] [2020-07-20 18:22:08,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:22:08,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11] total 30 [2020-07-20 18:22:08,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933586] [2020-07-20 18:22:08,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 18:22:08,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:22:08,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 18:22:08,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=728, Unknown=17, NotChecked=0, Total=870 [2020-07-20 18:22:08,275 INFO L87 Difference]: Start difference. First operand 121 states and 162 transitions. Second operand 30 states. [2020-07-20 18:22:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:22:11,955 INFO L93 Difference]: Finished difference Result 153 states and 210 transitions. [2020-07-20 18:22:11,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 18:22:11,960 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 49 [2020-07-20 18:22:11,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:22:11,960 INFO L225 Difference]: With dead ends: 153 [2020-07-20 18:22:11,961 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 18:22:11,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 55 SyntacticMatches, 16 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=129, Invalid=784, Unknown=17, NotChecked=0, Total=930 [2020-07-20 18:22:11,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 18:22:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 18:22:11,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 18:22:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 18:22:11,963 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2020-07-20 18:22:11,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:22:11,964 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 18:22:11,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 18:22:11,964 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 18:22:11,964 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 18:22:12,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:22:12,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 18:22:12,331 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 199 [2020-07-20 18:22:19,016 WARN L193 SmtUtils]: Spent 6.63 s on a formula simplification. DAG size of input: 199 DAG size of output: 13 [2020-07-20 18:22:25,914 WARN L193 SmtUtils]: Spent 6.89 s on a formula simplification. DAG size of input: 63 DAG size of output: 13 [2020-07-20 18:22:25,917 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 18:22:25,918 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 18:22:25,918 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 18:22:25,918 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 18:22:25,918 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 18:22:25,918 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 18:22:25,918 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 18:22:25,918 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-20 18:22:25,918 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-20 18:22:25,918 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-07-20 18:22:25,918 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-20 18:22:25,919 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-07-20 18:22:25,919 INFO L268 CegarLoopResult]: For program point L25(lines 25 28) no Hoare annotation was computed. [2020-07-20 18:22:25,919 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 33) no Hoare annotation was computed. [2020-07-20 18:22:25,919 INFO L268 CegarLoopResult]: For program point L23(lines 23 28) no Hoare annotation was computed. [2020-07-20 18:22:25,919 INFO L268 CegarLoopResult]: For program point L25-2(lines 21 28) no Hoare annotation was computed. [2020-07-20 18:22:25,919 INFO L268 CegarLoopResult]: For program point L21(lines 21 28) no Hoare annotation was computed. [2020-07-20 18:22:25,919 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 30) the Hoare annotation is: (= (mod (+ main_~v4~0 main_~i~0 main_~j~0 main_~k~0 1) 4294967296) (mod (+ main_~l~0 1) 4294967296)) [2020-07-20 18:22:25,919 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 30) the Hoare annotation is: (= (mod (+ main_~v4~0 main_~i~0 main_~j~0 main_~k~0 1) 4294967296) (mod (+ main_~l~0 1) 4294967296)) [2020-07-20 18:22:25,919 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 33) no Hoare annotation was computed. [2020-07-20 18:22:25,919 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 33) the Hoare annotation is: true [2020-07-20 18:22:25,919 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-07-20 18:22:25,920 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-20 18:22:25,920 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-07-20 18:22:25,920 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-07-20 18:22:25,920 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-07-20 18:22:25,920 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-07-20 18:22:25,920 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-07-20 18:22:25,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 06:22:25 BoogieIcfgContainer [2020-07-20 18:22:25,936 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 18:22:25,938 INFO L168 Benchmark]: Toolchain (without parser) took 530192.03 ms. Allocated memory was 146.8 MB in the beginning and 238.0 MB in the end (delta: 91.2 MB). Free memory was 103.7 MB in the beginning and 143.7 MB in the end (delta: -40.0 MB). Peak memory consumption was 51.2 MB. Max. memory is 7.1 GB. [2020-07-20 18:22:25,939 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 18:22:25,940 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.61 ms. Allocated memory is still 146.8 MB. Free memory was 103.3 MB in the beginning and 93.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-20 18:22:25,941 INFO L168 Benchmark]: Boogie Preprocessor took 109.34 ms. Allocated memory was 146.8 MB in the beginning and 205.0 MB in the end (delta: 58.2 MB). Free memory was 93.6 MB in the beginning and 184.1 MB in the end (delta: -90.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-07-20 18:22:25,942 INFO L168 Benchmark]: RCFGBuilder took 287.87 ms. Allocated memory is still 205.0 MB. Free memory was 184.1 MB in the beginning and 170.2 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 18:22:25,942 INFO L168 Benchmark]: TraceAbstraction took 529562.55 ms. Allocated memory was 205.0 MB in the beginning and 238.0 MB in the end (delta: 33.0 MB). Free memory was 169.5 MB in the beginning and 143.7 MB in the end (delta: 25.8 MB). Peak memory consumption was 58.8 MB. Max. memory is 7.1 GB. [2020-07-20 18:22:25,946 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 146.8 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 226.61 ms. Allocated memory is still 146.8 MB. Free memory was 103.3 MB in the beginning and 93.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.34 ms. Allocated memory was 146.8 MB in the beginning and 205.0 MB in the end (delta: 58.2 MB). Free memory was 93.6 MB in the beginning and 184.1 MB in the end (delta: -90.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 287.87 ms. Allocated memory is still 205.0 MB. Free memory was 184.1 MB in the beginning and 170.2 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 529562.55 ms. Allocated memory was 205.0 MB in the beginning and 238.0 MB in the end (delta: 33.0 MB). Free memory was 169.5 MB in the beginning and 143.7 MB in the end (delta: 25.8 MB). Peak memory consumption was 58.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 19]: Loop Invariant Derived loop invariant: (v4 + i + j + k + 1) % 4294967296 == (l + 1) % 4294967296 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 515.7s, OverallIterations: 8, TraceHistogramMax: 9, AutomataDifference: 375.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 13.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 99 SDtfs, 228 SDslu, 594 SDs, 0 SdLazy, 1694 SolverSat, 124 SolverUnsat, 146 SolverUnknown, 0 SolverNotchecked, 295.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 508 GetRequests, 341 SyntacticMatches, 27 SemanticMatches, 140 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 205.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=121occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 22 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 22 PreInvPairs, 47 NumberOfFragments, 33 HoareAnnotationTreeSize, 22 FomulaSimplifications, 160 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 7 FomulaSimplificationsInter, 786 FormulaSimplificationTreeSizeReductionInter, 13.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 137.6s InterpolantComputationTime, 248 NumberOfCodeBlocks, 202 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 469 ConstructedInterpolants, 2 QuantifiedInterpolants, 140556 SizeOfPredicates, 17 NumberOfNonLiveVariables, 537 ConjunctsInSsa, 177 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 349/918 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...