/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/sumt9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 18:14:09,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 18:14:09,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 18:14:09,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 18:14:09,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 18:14:09,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 18:14:09,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 18:14:09,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 18:14:09,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 18:14:09,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 18:14:09,836 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 18:14:09,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 18:14:09,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 18:14:09,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 18:14:09,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 18:14:09,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 18:14:09,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 18:14:09,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 18:14:09,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 18:14:09,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 18:14:09,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 18:14:09,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 18:14:09,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 18:14:09,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 18:14:09,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 18:14:09,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 18:14:09,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 18:14:09,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 18:14:09,866 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 18:14:09,882 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 18:14:09,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 18:14:09,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 18:14:09,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 18:14:09,885 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 18:14:09,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 18:14:09,885 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 18:14:09,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 18:14:09,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 18:14:09,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 18:14:09,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 18:14:09,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 18:14:09,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 18:14:09,887 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 18:14:09,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 18:14:09,887 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 18:14:09,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 18:14:09,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 18:14:09,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 18:14:09,888 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 18:14:09,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 18:14:09,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:14:09,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 18:14:09,889 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 18:14:09,889 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 18:14:09,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 18:14:09,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:14:09,890 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 18:14:09,890 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 18:14:09,890 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 18:14:10,225 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 18:14:10,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 18:14:10,246 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 18:14:10,247 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 18:14:10,248 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 18:14:10,249 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-07-20 18:14:10,322 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2148a64b8/414f9080b63d4a5a813431170f80d7b9/FLAG414d4c9f4 [2020-07-20 18:14:10,817 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 18:14:10,818 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt9.c [2020-07-20 18:14:10,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2148a64b8/414f9080b63d4a5a813431170f80d7b9/FLAG414d4c9f4 [2020-07-20 18:14:11,172 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2148a64b8/414f9080b63d4a5a813431170f80d7b9 [2020-07-20 18:14:11,186 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 18:14:11,190 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 18:14:11,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 18:14:11,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 18:14:11,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 18:14:11,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:14:11" (1/1) ... [2020-07-20 18:14:11,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3be1695f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:14:11, skipping insertion in model container [2020-07-20 18:14:11,201 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:14:11" (1/1) ... [2020-07-20 18:14:11,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 18:14:11,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 18:14:11,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:14:11,417 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 18:14:11,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:14:11,459 INFO L208 MainTranslator]: Completed translation [2020-07-20 18:14:11,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:14:11 WrapperNode [2020-07-20 18:14:11,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 18:14:11,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 18:14:11,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 18:14:11,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 18:14:11,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:14:11" (1/1) ... [2020-07-20 18:14:11,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:14:11" (1/1) ... [2020-07-20 18:14:11,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:14:11" (1/1) ... [2020-07-20 18:14:11,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:14:11" (1/1) ... [2020-07-20 18:14:11,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:14:11" (1/1) ... [2020-07-20 18:14:11,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:14:11" (1/1) ... [2020-07-20 18:14:11,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:14:11" (1/1) ... [2020-07-20 18:14:11,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 18:14:11,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 18:14:11,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 18:14:11,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 18:14:11,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:14:11" (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 [2020-07-20 18:14:11,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 18:14:11,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 18:14:11,672 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 18:14:11,672 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 18:14:11,673 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 18:14:11,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 18:14:11,673 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 18:14:11,673 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 18:14:11,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 18:14:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 18:14:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 18:14:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 18:14:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 18:14:11,971 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 18:14:11,972 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 18:14:11,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:14:11 BoogieIcfgContainer [2020-07-20 18:14:11,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 18:14:11,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 18:14:11,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 18:14:11,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 18:14:11,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:14:11" (1/3) ... [2020-07-20 18:14:11,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4300e5ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:14:11, skipping insertion in model container [2020-07-20 18:14:11,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:14:11" (2/3) ... [2020-07-20 18:14:11,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4300e5ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:14:11, skipping insertion in model container [2020-07-20 18:14:11,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:14:11" (3/3) ... [2020-07-20 18:14:11,998 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt9.c [2020-07-20 18:14:12,009 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 18:14:12,022 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 18:14:12,036 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 18:14:12,069 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 18:14:12,071 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 18:14:12,071 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 18:14:12,071 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 18:14:12,071 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 18:14:12,072 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 18:14:12,072 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 18:14:12,072 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 18:14:12,100 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-20 18:14:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 18:14:12,106 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:14:12,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:14:12,108 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:14:12,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:14:12,114 INFO L82 PathProgramCache]: Analyzing trace with hash -684006215, now seen corresponding path program 1 times [2020-07-20 18:14:12,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:14:12,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607516001] [2020-07-20 18:14:12,122 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 18:14:12,224 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 18:14:12,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:14:12,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 18:14:12,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:14:12,538 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 18:14:12,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:14:12,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607516001] [2020-07-20 18:14:12,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:14:12,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 18:14:12,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448429729] [2020-07-20 18:14:12,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 18:14:12,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:14:12,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 18:14:12,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 18:14:12,571 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 7 states. [2020-07-20 18:14:12,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:14:12,893 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2020-07-20 18:14:12,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 18:14:12,896 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-07-20 18:14:12,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:14:12,909 INFO L225 Difference]: With dead ends: 74 [2020-07-20 18:14:12,909 INFO L226 Difference]: Without dead ends: 41 [2020-07-20 18:14:12,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 18:14:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-20 18:14:12,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-20 18:14:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 18:14:12,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-20 18:14:12,975 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 14 [2020-07-20 18:14:12,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:14:12,976 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-20 18:14:12,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 18:14:12,977 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-20 18:14:12,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 18:14:12,978 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:14:12,978 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, 1, 1] [2020-07-20 18:14:13,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:14:13,195 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:14:13,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:14:13,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1563298987, now seen corresponding path program 1 times [2020-07-20 18:14:13,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:14:13,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223555751] [2020-07-20 18:14:13,197 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 18:14:13,259 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 18:14:13,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:14:13,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-20 18:14:13,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:14:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:14:13,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:14:13,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 18:14:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 18:14:13,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223555751] [2020-07-20 18:14:13,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 18:14:13,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2020-07-20 18:14:13,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723920685] [2020-07-20 18:14:13,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 18:14:13,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:14:13,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 18:14:13,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-20 18:14:13,795 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 6 states. [2020-07-20 18:14:45,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:14:45,119 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2020-07-20 18:14:45,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 18:14:45,120 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-07-20 18:14:45,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:14:45,122 INFO L225 Difference]: With dead ends: 58 [2020-07-20 18:14:45,123 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 18:14:45,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-20 18:14:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 18:14:45,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-07-20 18:14:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 18:14:45,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-07-20 18:14:45,136 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 29 [2020-07-20 18:14:45,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:14:45,136 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-07-20 18:14:45,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 18:14:45,138 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-07-20 18:14:45,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 18:14:45,141 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:14:45,142 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, 1, 1] [2020-07-20 18:14:45,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:14:45,344 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:14:45,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:14:45,345 INFO L82 PathProgramCache]: Analyzing trace with hash -908789750, now seen corresponding path program 1 times [2020-07-20 18:14:45,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:14:45,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971051214] [2020-07-20 18:14:45,347 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 18:14:45,394 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:14:45,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:14:45,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 18:14:45,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:14:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 18:14:45,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:14:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 18:14:45,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971051214] [2020-07-20 18:14:45,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:14:45,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 18:14:45,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234027425] [2020-07-20 18:14:45,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 18:14:45,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:14:45,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 18:14:45,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-07-20 18:14:45,513 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand 8 states. [2020-07-20 18:14:50,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:14:50,241 INFO L93 Difference]: Finished difference Result 123 states and 179 transitions. [2020-07-20 18:14:50,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 18:14:50,252 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-07-20 18:14:50,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:14:50,256 INFO L225 Difference]: With dead ends: 123 [2020-07-20 18:14:50,256 INFO L226 Difference]: Without dead ends: 91 [2020-07-20 18:14:50,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-07-20 18:14:50,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-20 18:14:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2020-07-20 18:14:50,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-20 18:14:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 117 transitions. [2020-07-20 18:14:50,279 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 117 transitions. Word has length 38 [2020-07-20 18:14:50,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:14:50,279 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 117 transitions. [2020-07-20 18:14:50,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 18:14:50,280 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 117 transitions. [2020-07-20 18:14:50,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 18:14:50,282 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:14:50,283 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:14:50,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:14:50,491 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:14:50,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:14:50,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1143083323, now seen corresponding path program 1 times [2020-07-20 18:14:50,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:14:50,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792853207] [2020-07-20 18:14:50,493 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 18:14:50,558 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 18:14:50,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:14:50,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-20 18:14:50,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:14:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 18:14:50,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:14:50,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 18:15:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 0 refuted. 4 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 18:15:13,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792853207] [2020-07-20 18:15:13,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:15:13,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2020-07-20 18:15:13,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354726444] [2020-07-20 18:15:13,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 18:15:13,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:15:13,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 18:15:13,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=208, Unknown=7, NotChecked=0, Total=272 [2020-07-20 18:15:13,101 INFO L87 Difference]: Start difference. First operand 88 states and 117 transitions. Second operand 17 states. [2020-07-20 18:16:36,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:16:36,712 INFO L93 Difference]: Finished difference Result 170 states and 246 transitions. [2020-07-20 18:16:36,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 18:16:36,713 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-07-20 18:16:36,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:16:36,717 INFO L225 Difference]: With dead ends: 170 [2020-07-20 18:16:36,717 INFO L226 Difference]: Without dead ends: 131 [2020-07-20 18:16:36,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=61, Invalid=238, Unknown=7, NotChecked=0, Total=306 [2020-07-20 18:16:36,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-07-20 18:16:36,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2020-07-20 18:16:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-20 18:16:36,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 175 transitions. [2020-07-20 18:16:36,743 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 175 transitions. Word has length 44 [2020-07-20 18:16:36,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:16:36,744 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 175 transitions. [2020-07-20 18:16:36,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 18:16:36,744 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 175 transitions. [2020-07-20 18:16:36,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-20 18:16:36,747 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:16:36,747 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:16:36,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:16:36,948 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:16:36,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:16:36,949 INFO L82 PathProgramCache]: Analyzing trace with hash 328242457, now seen corresponding path program 1 times [2020-07-20 18:16:36,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:16:36,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242614133] [2020-07-20 18:16:36,950 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 18:16:36,998 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:16:36,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:16:37,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-20 18:16:37,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:16:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-20 18:16:37,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:16:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 37 refuted. 20 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-20 18:16:55,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242614133] [2020-07-20 18:16:55,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:16:55,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2020-07-20 18:16:55,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514721326] [2020-07-20 18:16:55,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 18:16:55,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:16:56,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 18:16:56,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=158, Unknown=9, NotChecked=0, Total=240 [2020-07-20 18:16:56,000 INFO L87 Difference]: Start difference. First operand 129 states and 175 transitions. Second operand 16 states. [2020-07-20 18:16:58,321 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296))) is different from false [2020-07-20 18:17:00,391 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296))) is different from false [2020-07-20 18:17:02,473 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 7) 4294967296))) is different from false [2020-07-20 18:19:46,359 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296))) is different from false [2020-07-20 18:20:49,113 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 7) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 7) 4294967296))) is different from false [2020-07-20 18:21:24,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:21:24,142 INFO L93 Difference]: Finished difference Result 270 states and 400 transitions. [2020-07-20 18:21:24,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 18:21:24,220 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2020-07-20 18:21:24,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:21:24,223 INFO L225 Difference]: With dead ends: 270 [2020-07-20 18:21:24,223 INFO L226 Difference]: Without dead ends: 190 [2020-07-20 18:21:24,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=83, Invalid=163, Unknown=14, NotChecked=160, Total=420 [2020-07-20 18:21:24,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-20 18:21:24,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-07-20 18:21:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-07-20 18:21:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 264 transitions. [2020-07-20 18:21:24,252 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 264 transitions. Word has length 68 [2020-07-20 18:21:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:21:24,253 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 264 transitions. [2020-07-20 18:21:24,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 18:21:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 264 transitions. [2020-07-20 18:21:24,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 18:21:24,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:21:24,255 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:21:24,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:21:24,458 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:21:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:21:24,459 INFO L82 PathProgramCache]: Analyzing trace with hash -899528033, now seen corresponding path program 1 times [2020-07-20 18:21:24,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:21:24,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66937575] [2020-07-20 18:21:24,460 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 18:21:24,518 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:21:24,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:21:24,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 18:21:24,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:21:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 20 proven. 84 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 18:21:24,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:21:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 20 proven. 47 refuted. 37 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 18:21:58,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66937575] [2020-07-20 18:21:58,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:21:58,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 18:21:58,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837833220] [2020-07-20 18:21:58,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 18:21:58,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:21:58,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 18:21:58,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=108, Unknown=16, NotChecked=0, Total=182 [2020-07-20 18:21:58,305 INFO L87 Difference]: Start difference. First operand 187 states and 264 transitions. Second operand 14 states. [2020-07-20 18:22:00,653 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 9) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 9) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 9) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 9) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 5) 4294967296) 9) 4294967296))) is different from false [2020-07-20 18:22:02,726 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 9) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 9) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 9) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 9) 4294967296))) is different from false [2020-07-20 18:22:04,809 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 9) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 9) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 9) 4294967296))) is different from false [2020-07-20 18:22:06,922 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 9) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 9) 4294967296))) is different from false [2020-07-20 18:23:16,207 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 9) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 9) 4294967296))) is different from false [2020-07-20 18:23:22,470 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 9) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 9) 4294967296))) is different from false [2020-07-20 18:23:30,831 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 9) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 9) 4294967296))) is different from false [2020-07-20 18:23:50,633 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 9) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 9) 4294967296))) is different from false