/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_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:31:09,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:31:09,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:31:09,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:31:09,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:31:09,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:31:09,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:31:09,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:31:09,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:31:09,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:31:09,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:31:09,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:31:09,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:31:09,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:31:09,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:31:09,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:31:09,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:31:09,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:31:09,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:31:09,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:31:09,602 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:31:09,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:31:09,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:31:09,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:31:09,608 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:31:09,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:31:09,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:31:09,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:31:09,622 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 14:31:09,639 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:31:09,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:31:09,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:31:09,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:31:09,641 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:31:09,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:31:09,641 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:31:09,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:31:09,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:31:09,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:31:09,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:31:09,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:31:09,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:31:09,643 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:31:09,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:31:09,643 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:31:09,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:31:09,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:31:09,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:31:09,644 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:31:09,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:31:09,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:31:09,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:31:09,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:31:09,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:31:09,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:31:09,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:31:09,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:31:09,645 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:31:09,646 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_FUNCTIONS 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 -> 2 [2020-07-21 14:31:09,971 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:31:09,985 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:31:09,988 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:31:09,990 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:31:09,991 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:31:09,992 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt7.c [2020-07-21 14:31:10,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c72dfae53/1dbdecc12922492ea5e2cf59803f2923/FLAGd722f9b30 [2020-07-21 14:31:10,557 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:31:10,559 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt7.c [2020-07-21 14:31:10,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c72dfae53/1dbdecc12922492ea5e2cf59803f2923/FLAGd722f9b30 [2020-07-21 14:31:10,893 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c72dfae53/1dbdecc12922492ea5e2cf59803f2923 [2020-07-21 14:31:10,908 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:31:10,911 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:31:10,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:31:10,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:31:10,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:31:10,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:31:10" (1/1) ... [2020-07-21 14:31:10,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4af85b26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:10, skipping insertion in model container [2020-07-21 14:31:10,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:31:10" (1/1) ... [2020-07-21 14:31:10,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:31:10,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:31:11,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:31:11,155 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:31:11,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:31:11,194 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:31:11,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:11 WrapperNode [2020-07-21 14:31:11,195 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:31:11,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:31:11,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:31:11,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:31:11,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:11" (1/1) ... [2020-07-21 14:31:11,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:11" (1/1) ... [2020-07-21 14:31:11,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:11" (1/1) ... [2020-07-21 14:31:11,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:11" (1/1) ... [2020-07-21 14:31:11,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:11" (1/1) ... [2020-07-21 14:31:11,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:11" (1/1) ... [2020-07-21 14:31:11,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:11" (1/1) ... [2020-07-21 14:31:11,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:31:11,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:31:11,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:31:11,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:31:11,322 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:31:11,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:31:11,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:31:11,401 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:31:11,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 14:31:11,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:31:11,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:31:11,401 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:31:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:31:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 14:31:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 14:31:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:31:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:31:11,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:31:11,688 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:31:11,689 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 14:31:11,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:31:11 BoogieIcfgContainer [2020-07-21 14:31:11,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:31:11,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:31:11,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:31:11,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:31:11,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:31:10" (1/3) ... [2020-07-21 14:31:11,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@618aee44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:31:11, skipping insertion in model container [2020-07-21 14:31:11,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:31:11" (2/3) ... [2020-07-21 14:31:11,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@618aee44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:31:11, skipping insertion in model container [2020-07-21 14:31:11,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:31:11" (3/3) ... [2020-07-21 14:31:11,703 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt7.c [2020-07-21 14:31:11,715 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:31:11,734 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:31:11,782 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:31:11,839 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:31:11,839 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:31:11,839 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:31:11,839 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:31:11,840 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:31:11,840 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:31:11,840 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:31:11,840 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:31:11,867 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-21 14:31:11,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 14:31:11,873 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:31:11,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:31:11,875 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:31:11,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:31:11,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1473118151, now seen corresponding path program 1 times [2020-07-21 14:31:11,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:31:11,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194290776] [2020-07-21 14:31:11,888 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:31:11,986 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:31:11,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:31:11,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 14:31:11,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:31:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:31:12,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:31:12,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194290776] [2020-07-21 14:31:12,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:31:12,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 14:31:12,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127619870] [2020-07-21 14:31:12,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 14:31:12,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:31:12,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 14:31:12,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 14:31:12,218 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-07-21 14:31:12,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:31:12,481 INFO L93 Difference]: Finished difference Result 68 states and 99 transitions. [2020-07-21 14:31:12,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 14:31:12,484 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-07-21 14:31:12,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:31:12,496 INFO L225 Difference]: With dead ends: 68 [2020-07-21 14:31:12,496 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 14:31:12,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:31:12,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 14:31:12,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-21 14:31:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-21 14:31:12,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-07-21 14:31:12,553 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 14 [2020-07-21 14:31:12,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:31:12,554 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-07-21 14:31:12,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 14:31:12,555 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-07-21 14:31:12,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 14:31:12,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:31:12,556 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:31:12,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:31:12,772 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:31:12,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:31:12,773 INFO L82 PathProgramCache]: Analyzing trace with hash 633537884, now seen corresponding path program 1 times [2020-07-21 14:31:12,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:31:12,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042377898] [2020-07-21 14:31:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:31:12,837 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:31:12,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:31:12,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 14:31:12,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:31:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:31:13,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:31:13,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:31:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 14:31:13,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042377898] [2020-07-21 14:31:13,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 14:31:13,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2020-07-21 14:31:13,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960014077] [2020-07-21 14:31:13,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 14:31:13,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:31:13,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 14:31:13,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-21 14:31:13,323 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 6 states. [2020-07-21 14:31:27,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:31:27,947 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-07-21 14:31:27,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 14:31:27,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-07-21 14:31:27,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:31:27,954 INFO L225 Difference]: With dead ends: 52 [2020-07-21 14:31:27,954 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 14:31:27,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 14:31:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 14:31:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-07-21 14:31:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 14:31:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-21 14:31:27,966 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 27 [2020-07-21 14:31:27,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:31:27,967 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-21 14:31:27,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 14:31:27,967 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-21 14:31:27,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 14:31:27,968 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:31:27,969 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:31:28,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:31:28,170 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:31:28,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:31:28,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1461697819, now seen corresponding path program 1 times [2020-07-21 14:31:28,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:31:28,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884121012] [2020-07-21 14:31:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:31:28,240 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:31:28,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:31:28,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 14:31:28,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:31:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 14:31:28,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:31:28,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 14:31:34,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 14:31:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 9 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 14:31:45,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884121012] [2020-07-21 14:31:45,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:31:45,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-07-21 14:31:45,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29453488] [2020-07-21 14:31:45,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 14:31:45,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:31:45,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 14:31:45,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=63, Unknown=7, NotChecked=0, Total=110 [2020-07-21 14:31:45,183 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 11 states. [2020-07-21 14:31:47,422 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (let ((.cse0 (+ c_main_~l~0 2))) (or (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)))) (let ((.cse1 (+ c_main_~l~0 1))) (or (< 0 (mod (mod (mod .cse1 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse1 4294967296) 7) 4294967296))))) is different from false [2020-07-21 14:31:49,501 WARN L860 $PredicateComparison]: unable to prove that (and (or (= 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296))) (let ((.cse0 (+ c_main_~l~0 1))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296))))) is different from true [2020-07-21 14:31:51,570 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (let ((.cse0 (+ c_main_~l~0 1))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296))))) is different from false [2020-07-21 14:31:53,638 WARN L860 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (let ((.cse0 (+ c_main_~l~0 1))) (or (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296)) (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296))))) is different from true [2020-07-21 14:33:53,231 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 6) 4294967296)) (let ((.cse0 (+ c_main_~l~0 2))) (or (= 0 (mod (mod (mod .cse0 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod .cse0 4294967296) 6) 4294967296))))) is different from false [2020-07-21 14:34:12,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:34:12,677 INFO L93 Difference]: Finished difference Result 104 states and 143 transitions. [2020-07-21 14:34:12,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 14:34:12,684 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-07-21 14:34:12,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:34:12,688 INFO L225 Difference]: With dead ends: 104 [2020-07-21 14:34:12,688 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 14:34:12,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=48, Invalid=66, Unknown=12, NotChecked=84, Total=210 [2020-07-21 14:34:12,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 14:34:12,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2020-07-21 14:34:12,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 14:34:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2020-07-21 14:34:12,713 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 36 [2020-07-21 14:34:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:34:12,714 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2020-07-21 14:34:12,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 14:34:12,714 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2020-07-21 14:34:12,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 14:34:12,716 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:34:12,716 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:34:12,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:34:12,932 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:34:12,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:34:12,933 INFO L82 PathProgramCache]: Analyzing trace with hash 782958555, now seen corresponding path program 1 times [2020-07-21 14:34:12,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:34:12,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963850919] [2020-07-21 14:34:12,935 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:34:12,989 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:34:12,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:34:12,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-21 14:34:12,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:34:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 14:34:13,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:34:13,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:34:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 6 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 14:34:32,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963850919] [2020-07-21 14:34:32,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:34:32,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2020-07-21 14:34:32,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491698545] [2020-07-21 14:34:32,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 14:34:32,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:34:32,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 14:34:32,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=185, Unknown=7, NotChecked=0, Total=240 [2020-07-21 14:34:32,659 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand 16 states. [2020-07-21 14:34:47,896 WARN L193 SmtUtils]: Spent 4.24 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 14:35:02,945 WARN L193 SmtUtils]: Spent 6.35 s on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 14:35:37,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:35:37,389 INFO L93 Difference]: Finished difference Result 143 states and 200 transitions. [2020-07-21 14:35:37,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 14:35:37,390 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-07-21 14:35:37,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:35:37,392 INFO L225 Difference]: With dead ends: 143 [2020-07-21 14:35:37,392 INFO L226 Difference]: Without dead ends: 109 [2020-07-21 14:35:37,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 47.4s TimeCoverageRelationStatistics Valid=70, Invalid=257, Unknown=15, NotChecked=0, Total=342 [2020-07-21 14:35:37,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-07-21 14:35:37,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-07-21 14:35:37,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-21 14:35:37,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 144 transitions. [2020-07-21 14:35:37,415 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 144 transitions. Word has length 40 [2020-07-21 14:35:37,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:35:37,415 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 144 transitions. [2020-07-21 14:35:37,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 14:35:37,415 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 144 transitions. [2020-07-21 14:35:37,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-21 14:35:37,417 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:35:37,418 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:35:37,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:35:37,632 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:35:37,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:35:37,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1571070263, now seen corresponding path program 1 times [2020-07-21 14:35:37,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:35:37,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128841192] [2020-07-21 14:35:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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