/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:50:09,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:50:09,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:50:09,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:50:09,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:50:09,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:50:09,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:50:09,526 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:50:09,528 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:50:09,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:50:09,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:50:09,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:50:09,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:50:09,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:50:09,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:50:09,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:50:09,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:50:09,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:50:09,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:50:09,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:50:09,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:50:09,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:50:09,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:50:09,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:50:09,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:50:09,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:50:09,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:50:09,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:50:09,593 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 20:50:09,620 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:50:09,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:50:09,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:50:09,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:50:09,623 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:50:09,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:50:09,623 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:50:09,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:50:09,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:50:09,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:50:09,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:50:09,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:50:09,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:50:09,626 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:50:09,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:50:09,627 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:50:09,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:50:09,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:50:09,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:50:09,628 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:50:09,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:50:09,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:50:09,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:50:09,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:50:09,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:50:09,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:50:09,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:50:09,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:50:09,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:50:09,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 20:50:09,991 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:50:10,005 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:50:10,009 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:50:10,011 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:50:10,011 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:50:10,012 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-07-21 20:50:10,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d9357fff/9ee4049088b4401999ffb2fdd3371bf0/FLAGf12fbcab3 [2020-07-21 20:50:10,554 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:50:10,555 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-07-21 20:50:10,566 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d9357fff/9ee4049088b4401999ffb2fdd3371bf0/FLAGf12fbcab3 [2020-07-21 20:50:10,895 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d9357fff/9ee4049088b4401999ffb2fdd3371bf0 [2020-07-21 20:50:10,908 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:50:10,912 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:50:10,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:50:10,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:50:10,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:50:10,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:50:10" (1/1) ... [2020-07-21 20:50:10,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dbfd2bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:10, skipping insertion in model container [2020-07-21 20:50:10,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:50:10" (1/1) ... [2020-07-21 20:50:10,934 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:50:10,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:50:11,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:50:11,146 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:50:11,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:50:11,182 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:50:11,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:11 WrapperNode [2020-07-21 20:50:11,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:50:11,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:50:11,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:50:11,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:50:11,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:11" (1/1) ... [2020-07-21 20:50:11,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:11" (1/1) ... [2020-07-21 20:50:11,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:11" (1/1) ... [2020-07-21 20:50:11,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:11" (1/1) ... [2020-07-21 20:50:11,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:11" (1/1) ... [2020-07-21 20:50:11,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:11" (1/1) ... [2020-07-21 20:50:11,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:11" (1/1) ... [2020-07-21 20:50:11,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:50:11,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:50:11,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:50:11,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:50:11,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:11" (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 20:50:11,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:50:11,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:50:11,391 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:50:11,391 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:50:11,391 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:50:11,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:50:11,392 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:50:11,392 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:50:11,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:50:11,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:50:11,392 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:50:11,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:50:11,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:50:11,670 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:50:11,670 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 20:50:11,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:50:11 BoogieIcfgContainer [2020-07-21 20:50:11,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:50:11,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:50:11,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:50:11,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:50:11,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:50:10" (1/3) ... [2020-07-21 20:50:11,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773d9f02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:50:11, skipping insertion in model container [2020-07-21 20:50:11,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:50:11" (2/3) ... [2020-07-21 20:50:11,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773d9f02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:50:11, skipping insertion in model container [2020-07-21 20:50:11,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:50:11" (3/3) ... [2020-07-21 20:50:11,686 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt5.c [2020-07-21 20:50:11,701 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:50:11,714 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:50:11,737 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:50:11,771 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:50:11,771 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:50:11,771 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:50:11,772 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:50:11,772 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:50:11,772 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:50:11,772 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:50:11,773 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:50:11,795 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-21 20:50:11,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 20:50:11,802 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:50:11,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:50:11,804 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:50:11,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:50:11,812 INFO L82 PathProgramCache]: Analyzing trace with hash 333887070, now seen corresponding path program 1 times [2020-07-21 20:50:11,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:50:11,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375925921] [2020-07-21 20:50:11,824 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 20:50:11,894 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:50:11,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:50:11,899 WARN L261 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 20:50:11,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:50:12,026 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 20:50:12,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:50:12,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375925921] [2020-07-21 20:50:12,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:50:12,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 20:50:12,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559801024] [2020-07-21 20:50:12,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 20:50:12,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:50:12,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 20:50:12,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 20:50:12,063 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-07-21 20:50:12,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:50:12,214 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2020-07-21 20:50:12,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 20:50:12,217 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-21 20:50:12,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:50:12,229 INFO L225 Difference]: With dead ends: 53 [2020-07-21 20:50:12,229 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 20:50:12,234 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 [2020-07-21 20:50:12,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 20:50:12,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 20:50:12,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 20:50:12,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-07-21 20:50:12,274 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2020-07-21 20:50:12,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:50:12,274 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-07-21 20:50:12,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 20:50:12,275 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-07-21 20:50:12,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-21 20:50:12,276 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:50:12,276 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:50:12,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:50:12,488 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:50:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:50:12,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1451693947, now seen corresponding path program 1 times [2020-07-21 20:50:12,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:50:12,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738584208] [2020-07-21 20:50:12,490 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 20:50:12,534 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:50:12,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:50:12,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 20:50:12,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:50:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:50:12,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:50:12,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:50:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:50:13,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738584208] [2020-07-21 20:50:13,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:50:13,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 20:50:13,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74783165] [2020-07-21 20:50:13,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 20:50:13,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:50:13,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 20:50:13,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-21 20:50:13,121 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 14 states. [2020-07-21 20:50:23,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:50:23,803 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2020-07-21 20:50:23,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 20:50:23,804 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2020-07-21 20:50:23,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:50:23,806 INFO L225 Difference]: With dead ends: 43 [2020-07-21 20:50:23,806 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 20:50:23,808 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 [2020-07-21 20:50:23,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 20:50:23,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-21 20:50:23,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 20:50:23,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-21 20:50:23,815 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-07-21 20:50:23,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:50:23,815 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-21 20:50:23,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 20:50:23,816 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-21 20:50:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 20:50:23,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:50:23,817 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:50:24,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:50:24,031 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:50:24,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:50:24,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1035578608, now seen corresponding path program 1 times [2020-07-21 20:50:24,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:50:24,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231964988] [2020-07-21 20:50:24,033 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 20:50:24,109 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:50:24,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:50:24,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 20:50:24,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:50:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:50:24,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:50:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:50:32,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231964988] [2020-07-21 20:50:32,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:50:32,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 20:50:32,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379379077] [2020-07-21 20:50:32,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 20:50:32,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:50:32,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 20:50:32,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=31, Unknown=4, NotChecked=0, Total=56 [2020-07-21 20:50:32,558 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 8 states. [2020-07-21 20:50:34,711 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod c_main_~l~0 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 5) 4294967296))) is different from false [2020-07-21 20:51:44,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:51:44,414 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2020-07-21 20:51:44,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 20:51:44,415 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-07-21 20:51:44,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:51:44,417 INFO L225 Difference]: With dead ends: 54 [2020-07-21 20:51:44,417 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 20:51:44,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=23, Invalid=32, Unknown=5, NotChecked=12, Total=72 [2020-07-21 20:51:44,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 20:51:44,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-07-21 20:51:44,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 20:51:44,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-07-21 20:51:44,427 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 24 [2020-07-21 20:51:44,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:51:44,427 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-07-21 20:51:44,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 20:51:44,427 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-07-21 20:51:44,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 20:51:44,428 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:51:44,429 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:51:44,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:51:44,630 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:51:44,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:51:44,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2020075371, now seen corresponding path program 1 times [2020-07-21 20:51:44,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:51:44,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361761286] [2020-07-21 20:51:44,634 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 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 20:51:44,729 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:51:44,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:51:44,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 20:51:44,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:51:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:51:44,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:51:44,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 20:52:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 12 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 20:52:04,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361761286] [2020-07-21 20:52:04,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:52:04,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2020-07-21 20:52:04,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752381172] [2020-07-21 20:52:04,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 20:52:04,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:52:04,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 20:52:04,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=185, Unknown=8, NotChecked=0, Total=240 [2020-07-21 20:52:04,277 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 16 states. [2020-07-21 20:52:13,001 WARN L193 SmtUtils]: Spent 4.23 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 20:53:08,642 WARN L193 SmtUtils]: Spent 4.22 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 20:53:15,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:53:15,024 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2020-07-21 20:53:15,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 20:53:15,029 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-07-21 20:53:15,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:53:15,030 INFO L225 Difference]: With dead ends: 68 [2020-07-21 20:53:15,030 INFO L226 Difference]: Without dead ends: 49 [2020-07-21 20:53:15,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=67, Invalid=262, Unknown=13, NotChecked=0, Total=342 [2020-07-21 20:53:15,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-21 20:53:15,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-07-21 20:53:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 20:53:15,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2020-07-21 20:53:15,044 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 27 [2020-07-21 20:53:15,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:53:15,045 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2020-07-21 20:53:15,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 20:53:15,045 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2020-07-21 20:53:15,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 20:53:15,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:53:15,046 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:53:15,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:53:15,248 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:53:15,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:53:15,249 INFO L82 PathProgramCache]: Analyzing trace with hash -928147861, now seen corresponding path program 1 times [2020-07-21 20:53:15,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:53:15,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588857821] [2020-07-21 20:53:15,250 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