/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/sumt5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 18:13:34,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 18:13:34,798 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 18:13:34,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 18:13:34,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 18:13:34,812 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 18:13:34,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 18:13:34,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 18:13:34,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 18:13:34,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 18:13:34,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 18:13:34,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 18:13:34,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 18:13:34,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 18:13:34,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 18:13:34,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 18:13:34,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 18:13:34,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 18:13:34,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 18:13:34,846 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 18:13:34,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 18:13:34,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 18:13:34,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 18:13:34,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 18:13:34,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 18:13:34,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 18:13:34,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 18:13:34,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 18:13:34,877 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 18:13:34,894 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 18:13:34,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 18:13:34,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 18:13:34,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 18:13:34,896 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 18:13:34,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 18:13:34,897 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 18:13:34,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 18:13:34,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 18:13:34,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 18:13:34,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 18:13:34,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 18:13:34,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 18:13:34,898 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 18:13:34,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 18:13:34,898 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 18:13:34,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 18:13:34,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 18:13:34,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 18:13:34,899 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 18:13:34,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 18:13:34,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:13:34,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 18:13:34,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 18:13:34,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 18:13:34,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 18:13:34,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:13:34,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 18:13:34,901 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 18:13:34,901 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 18:13:35,220 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 18:13:35,241 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 18:13:35,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 18:13:35,249 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 18:13:35,249 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 18:13:35,251 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-07-20 18:13:35,329 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/163351cef/bffbf7d8ddb3430ca51170bc9d3cac32/FLAGa657b5024 [2020-07-20 18:13:35,747 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 18:13:35,747 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt5.c [2020-07-20 18:13:35,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/163351cef/bffbf7d8ddb3430ca51170bc9d3cac32/FLAGa657b5024 [2020-07-20 18:13:36,155 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/163351cef/bffbf7d8ddb3430ca51170bc9d3cac32 [2020-07-20 18:13:36,164 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 18:13:36,167 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 18:13:36,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 18:13:36,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 18:13:36,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 18:13:36,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:13:36" (1/1) ... [2020-07-20 18:13:36,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c21cb41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:36, skipping insertion in model container [2020-07-20 18:13:36,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:13:36" (1/1) ... [2020-07-20 18:13:36,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 18:13:36,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 18:13:36,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:13:36,364 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 18:13:36,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:13:36,400 INFO L208 MainTranslator]: Completed translation [2020-07-20 18:13:36,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:36 WrapperNode [2020-07-20 18:13:36,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 18:13:36,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 18:13:36,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 18:13:36,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 18:13:36,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:36" (1/1) ... [2020-07-20 18:13:36,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:36" (1/1) ... [2020-07-20 18:13:36,422 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:36" (1/1) ... [2020-07-20 18:13:36,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:36" (1/1) ... [2020-07-20 18:13:36,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:36" (1/1) ... [2020-07-20 18:13:36,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:36" (1/1) ... [2020-07-20 18:13:36,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:36" (1/1) ... [2020-07-20 18:13:36,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 18:13:36,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 18:13:36,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 18:13:36,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 18:13:36,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:13:36,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 18:13:36,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 18:13:36,596 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 18:13:36,596 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 18:13:36,596 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 18:13:36,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 18:13:36,596 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 18:13:36,596 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 18:13:36,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 18:13:36,597 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 18:13:36,597 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 18:13:36,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 18:13:36,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 18:13:36,832 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 18:13:36,833 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 18:13:36,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:13:36 BoogieIcfgContainer [2020-07-20 18:13:36,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 18:13:36,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 18:13:36,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 18:13:36,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 18:13:36,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:13:36" (1/3) ... [2020-07-20 18:13:36,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d1b6fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:13:36, skipping insertion in model container [2020-07-20 18:13:36,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:13:36" (2/3) ... [2020-07-20 18:13:36,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d1b6fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:13:36, skipping insertion in model container [2020-07-20 18:13:36,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:13:36" (3/3) ... [2020-07-20 18:13:36,844 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt5.c [2020-07-20 18:13:36,855 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 18:13:36,862 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 18:13:36,877 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 18:13:36,902 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 18:13:36,902 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 18:13:36,902 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 18:13:36,902 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 18:13:36,902 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 18:13:36,903 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 18:13:36,903 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 18:13:36,903 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 18:13:36,921 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-20 18:13:36,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 18:13:36,926 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:13:36,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:13:36,927 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:13:36,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:13:36,932 INFO L82 PathProgramCache]: Analyzing trace with hash 333887070, now seen corresponding path program 1 times [2020-07-20 18:13:36,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:13:36,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287711060] [2020-07-20 18:13:36,940 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:13:37,026 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 18:13:37,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:13:37,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 18:13:37,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:13:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:13:37,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:13:37,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287711060] [2020-07-20 18:13:37,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:13:37,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 18:13:37,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553217221] [2020-07-20 18:13:37,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 18:13:37,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:13:37,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 18:13:37,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 18:13:37,095 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-07-20 18:13:37,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:13:37,121 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-07-20 18:13:37,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 18:13:37,123 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-20 18:13:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:13:37,133 INFO L225 Difference]: With dead ends: 37 [2020-07-20 18:13:37,133 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 18:13:37,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 18:13:37,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 18:13:37,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 18:13:37,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 18:13:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-07-20 18:13:37,179 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2020-07-20 18:13:37,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:13:37,180 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-07-20 18:13:37,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 18:13:37,180 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-07-20 18:13:37,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 18:13:37,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:13:37,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:13:37,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:13:37,395 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:13:37,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:13:37,396 INFO L82 PathProgramCache]: Analyzing trace with hash 309875524, now seen corresponding path program 1 times [2020-07-20 18:13:37,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:13:37,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944687346] [2020-07-20 18:13:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:13:37,446 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 18:13:37,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:13:37,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 18:13:37,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:13:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:13:37,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:13:37,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944687346] [2020-07-20 18:13:37,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:13:37,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 18:13:37,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228165426] [2020-07-20 18:13:37,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 18:13:37,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:13:37,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 18:13:37,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:13:37,535 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2020-07-20 18:13:37,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:13:37,616 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2020-07-20 18:13:37,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 18:13:37,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-20 18:13:37,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:13:37,618 INFO L225 Difference]: With dead ends: 34 [2020-07-20 18:13:37,619 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 18:13:37,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 18:13:37,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 18:13:37,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-20 18:13:37,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 18:13:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-07-20 18:13:37,627 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2020-07-20 18:13:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:13:37,628 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-07-20 18:13:37,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 18:13:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-07-20 18:13:37,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 18:13:37,629 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:13:37,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:13:37,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:13:37,842 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:13:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:13:37,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1451693947, now seen corresponding path program 1 times [2020-07-20 18:13:37,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:13:37,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488932167] [2020-07-20 18:13:37,846 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:13:37,888 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 18:13:37,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:13:37,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 18:13:37,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:13:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:13:38,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:13:38,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 18:13:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:13:38,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488932167] [2020-07-20 18:13:38,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:13:38,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 18:13:38,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722922551] [2020-07-20 18:13:38,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 18:13:38,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:13:38,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 18:13:38,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-07-20 18:13:38,368 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 14 states. [2020-07-20 18:13:42,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:13:42,784 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2020-07-20 18:13:42,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 18:13:42,785 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2020-07-20 18:13:42,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:13:42,786 INFO L225 Difference]: With dead ends: 43 [2020-07-20 18:13:42,787 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 18:13:42,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-07-20 18:13:42,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 18:13:42,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 18:13:42,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 18:13:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-20 18:13:42,795 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-07-20 18:13:42,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:13:42,795 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-20 18:13:42,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 18:13:42,795 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-20 18:13:42,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 18:13:42,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:13:42,797 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:13:43,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:13:43,011 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:13:43,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:13:43,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1035578608, now seen corresponding path program 1 times [2020-07-20 18:13:43,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:13:43,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469270571] [2020-07-20 18:13:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:13:43,063 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:13:43,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:13:43,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 18:13:43,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:13:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:13:43,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:13:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 7 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:13:51,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469270571] [2020-07-20 18:13:51,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:13:51,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 18:13:51,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316273762] [2020-07-20 18:13:51,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 18:13:51,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:13:51,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 18:13:51,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=31, Unknown=4, NotChecked=0, Total=56 [2020-07-20 18:13:51,419 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 8 states. [2020-07-20 18:13:53,577 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 [2020-07-20 18:14:39,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:14:39,338 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2020-07-20 18:14:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 18:14:39,340 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-07-20 18:14:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:14:39,342 INFO L225 Difference]: With dead ends: 54 [2020-07-20 18:14:39,342 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 18:14:39,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=23, Invalid=32, Unknown=5, NotChecked=12, Total=72 [2020-07-20 18:14:39,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 18:14:39,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-07-20 18:14:39,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 18:14:39,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-07-20 18:14:39,351 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 24 [2020-07-20 18:14:39,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:14:39,352 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-07-20 18:14:39,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 18:14:39,352 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-07-20 18:14:39,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 18:14:39,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:14:39,353 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] [2020-07-20 18:14:39,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:14:39,555 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:14:39,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:14:39,555 INFO L82 PathProgramCache]: Analyzing trace with hash 2020075371, now seen corresponding path program 1 times [2020-07-20 18:14:39,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:14:39,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096467116] [2020-07-20 18:14:39,557 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 18:14:39,595 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 18:14:39,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:14:39,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-20 18:14:39,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:14:39,980 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:14:39,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:14:40,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 18:14:50,933 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:14:50,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096467116] [2020-07-20 18:14:50,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:14:50,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-20 18:14:50,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972840933] [2020-07-20 18:14:50,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 18:14:50,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:14:50,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 18:14:50,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=366, Unknown=5, NotChecked=0, Total=462 [2020-07-20 18:14:50,938 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 22 states. [2020-07-20 18:15:17,130 WARN L193 SmtUtils]: Spent 18.62 s on a formula simplification. DAG size of input: 48 DAG size of output: 12 [2020-07-20 18:16:15,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:16:15,444 INFO L93 Difference]: Finished difference Result 74 states and 99 transitions. [2020-07-20 18:16:15,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 18:16:15,509 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-07-20 18:16:15,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:16:15,511 INFO L225 Difference]: With dead ends: 74 [2020-07-20 18:16:15,511 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 18:16:15,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=148, Invalid=600, Unknown=8, NotChecked=0, Total=756 [2020-07-20 18:16:15,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 18:16:15,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-07-20 18:16:15,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-20 18:16:15,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2020-07-20 18:16:15,522 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 27 [2020-07-20 18:16:15,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:16:15,522 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2020-07-20 18:16:15,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 18:16:15,522 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2020-07-20 18:16:15,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-20 18:16:15,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:16:15,524 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:16:15,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:16:15,725 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:16:15,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:16:15,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1204685030, now seen corresponding path program 1 times [2020-07-20 18:16:15,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:16:15,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41861831] [2020-07-20 18:16:15,727 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 18:16:15,765 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:16:15,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:16:15,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 18:16:15,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:16:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:16:15,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:16:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:16:28,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41861831] [2020-07-20 18:16:28,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:16:28,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-20 18:16:28,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811837376] [2020-07-20 18:16:28,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 18:16:28,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:16:28,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 18:16:28,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=85, Unknown=6, NotChecked=0, Total=132 [2020-07-20 18:16:28,347 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand 12 states. [2020-07-20 18:16:30,520 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 5) 4294967296))) is different from false [2020-07-20 18:16:32,583 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 5) 4294967296))) is different from false [2020-07-20 18:16:36,723 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 5) 4294967296))) is different from false [2020-07-20 18:16:47,050 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 5) 4294967296))) is different from false [2020-07-20 18:17:14,050 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 2) 4294967296) 5) 4294967296))) is different from false [2020-07-20 18:17:16,130 WARN L860 $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 2) 4294967296) 5) 4294967296))) is different from true [2020-07-20 18:17:49,347 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 [2020-07-20 18:18:18,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:18:18,541 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2020-07-20 18:18:18,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 18:18:18,542 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-07-20 18:18:18,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:18:18,544 INFO L225 Difference]: With dead ends: 100 [2020-07-20 18:18:18,544 INFO L226 Difference]: Without dead ends: 77 [2020-07-20 18:18:18,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=53, Invalid=90, Unknown=13, NotChecked=150, Total=306 [2020-07-20 18:18:18,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-20 18:18:18,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-07-20 18:18:18,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 18:18:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2020-07-20 18:18:18,559 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 35 [2020-07-20 18:18:18,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:18:18,560 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2020-07-20 18:18:18,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 18:18:18,560 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2020-07-20 18:18:18,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 18:18:18,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:18:18,561 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:18:18,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:18:18,769 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:18:18,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:18:18,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1788744647, now seen corresponding path program 1 times [2020-07-20 18:18:18,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:18:18,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402620908] [2020-07-20 18:18:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:18:18,818 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 18:18:18,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:18:18,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-20 18:18:18,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:18:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:18:19,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:18:19,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 18:18:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:18:30,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402620908] [2020-07-20 18:18:30,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:18:30,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2020-07-20 18:18:30,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926404340] [2020-07-20 18:18:30,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 18:18:30,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:18:30,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 18:18:30,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=823, Unknown=5, NotChecked=0, Total=992 [2020-07-20 18:18:30,976 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand 32 states. [2020-07-20 18:18:40,603 WARN L193 SmtUtils]: Spent 6.27 s on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 18:18:50,418 WARN L193 SmtUtils]: Spent 9.22 s on a formula simplification that was a NOOP. DAG size: 80 [2020-07-20 18:19:37,583 WARN L193 SmtUtils]: Spent 38.46 s on a formula simplification. DAG size of input: 64 DAG size of output: 21 [2020-07-20 18:19:47,903 WARN L193 SmtUtils]: Spent 5.52 s on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 18:19:58,646 WARN L193 SmtUtils]: Spent 4.84 s on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 18:21:01,348 WARN L193 SmtUtils]: Spent 39.69 s on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-07-20 18:21:08,644 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 18:21:34,109 WARN L193 SmtUtils]: Spent 12.55 s on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 18:21:36,609 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 18:22:18,287 WARN L193 SmtUtils]: Spent 12.54 s on a formula simplification. DAG size of input: 40 DAG size of output: 21 [2020-07-20 18:22:26,834 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 18:23:17,409 WARN L193 SmtUtils]: Spent 8.34 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 18:23:47,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:23:47,797 INFO L93 Difference]: Finished difference Result 139 states and 200 transitions. [2020-07-20 18:23:47,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 18:23:47,877 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2020-07-20 18:23:47,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:23:47,879 INFO L225 Difference]: With dead ends: 139 [2020-07-20 18:23:47,879 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 18:23:47,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 257.0s TimeCoverageRelationStatistics Valid=387, Invalid=1723, Unknown=52, NotChecked=0, Total=2162 [2020-07-20 18:23:47,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 18:23:47,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-07-20 18:23:47,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-20 18:23:47,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2020-07-20 18:23:47,901 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 39 [2020-07-20 18:23:47,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:23:47,902 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2020-07-20 18:23:47,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 18:23:47,902 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2020-07-20 18:23:47,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 18:23:47,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:23:47,904 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:23:48,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:23:48,106 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:23:48,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:23:48,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1936830739, now seen corresponding path program 2 times [2020-07-20 18:23:48,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:23:48,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051598166] [2020-07-20 18:23:48,109 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:23:48,172 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:23:48,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:23:48,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 18:23:48,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:23:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 75 proven. 94 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-20 18:23:48,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 18:24:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 75 proven. 84 refuted. 10 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-20 18:24:36,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051598166] [2020-07-20 18:24:36,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 18:24:36,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-20 18:24:36,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60697538] [2020-07-20 18:24:36,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 18:24:36,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:36,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 18:24:36,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=198, Unknown=23, NotChecked=0, Total=306 [2020-07-20 18:24:36,365 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand 18 states. [2020-07-20 18:24:38,690 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 6) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 5) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 5) 4294967296))) is different from false [2020-07-20 18:24:40,761 WARN L860 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 6) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 5) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 5) 4294967296))) is different from true [2020-07-20 18:24:42,817 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 6) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 5) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 5) 4294967296))) is different from false [2020-07-20 18:24:44,878 WARN L860 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 6) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 5) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 5) 4294967296))) is different from true [2020-07-20 18:24:46,945 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 6) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 5) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 5) 4294967296))) is different from false [2020-07-20 18:24:49,026 WARN L860 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 6) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 5) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 5) 4294967296))) is different from true [2020-07-20 18:24:53,190 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 1) 4294967296) 5) 4294967296))) is different from false [2020-07-20 18:24:55,273 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 6) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod (+ c_main_~l~0 5) 4294967296) 5) 4294967296))) is different from false [2020-07-20 18:24:59,444 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 3) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 5) 4294967296))) is different from false [2020-07-20 18:25:16,348 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 2) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 5) 4294967296))) is different from false [2020-07-20 18:25:52,697 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (mod (mod (+ c_main_~l~0 4) 4294967296) 5) 4294967296)) (< 0 (mod (mod (mod c_main_~l~0 4294967296) 5) 4294967296))) is different from false [2020-07-20 18:25:54,831 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 5) 4294967296) 5) 4294967296))) is different from false [2020-07-20 18:26:11,901 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