/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:51:31,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:51:31,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:51:31,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:51:31,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:51:31,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:51:31,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:51:31,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:51:31,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:51:31,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:51:31,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:51:31,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:51:31,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:51:31,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:51:31,684 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:51:31,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:51:31,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:51:31,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:51:31,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:51:31,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:51:31,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:51:31,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:51:31,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:51:31,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:51:31,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:51:31,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:51:31,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:51:31,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:51:31,708 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 11:51:31,726 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:51:31,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:51:31,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:51:31,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:51:31,728 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:51:31,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:51:31,729 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:51:31,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:51:31,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:51:31,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:51:31,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:51:31,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:51:31,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:51:31,730 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:51:31,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:51:31,730 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:51:31,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:51:31,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:51:31,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:51:31,731 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:51:31,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:51:31,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:51:31,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:51:31,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:51:31,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:51:31,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:51:31,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:31,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:51:31,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:51:31,733 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 -> NOT_INCREMENTALLY [2020-07-21 11:51:32,063 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:51:32,083 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:51:32,087 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:51:32,088 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:51:32,091 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:51:32,092 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-07-21 11:51:32,172 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e40b5139/9482baaea8194c518b354b8ee1bf681d/FLAGafb385b42 [2020-07-21 11:51:32,627 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:51:32,628 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-07-21 11:51:32,636 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e40b5139/9482baaea8194c518b354b8ee1bf681d/FLAGafb385b42 [2020-07-21 11:51:33,003 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e40b5139/9482baaea8194c518b354b8ee1bf681d [2020-07-21 11:51:33,014 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:51:33,017 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:51:33,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:51:33,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:51:33,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:51:33,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:51:33" (1/1) ... [2020-07-21 11:51:33,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56b49462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:33, skipping insertion in model container [2020-07-21 11:51:33,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:51:33" (1/1) ... [2020-07-21 11:51:33,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:51:33,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:51:33,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:51:33,270 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:51:33,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:51:33,296 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:51:33,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:33 WrapperNode [2020-07-21 11:51:33,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:51:33,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:51:33,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:51:33,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:51:33,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:33" (1/1) ... [2020-07-21 11:51:33,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:33" (1/1) ... [2020-07-21 11:51:33,313 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:33" (1/1) ... [2020-07-21 11:51:33,313 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:33" (1/1) ... [2020-07-21 11:51:33,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:33" (1/1) ... [2020-07-21 11:51:33,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:33" (1/1) ... [2020-07-21 11:51:33,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:33" (1/1) ... [2020-07-21 11:51:33,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:51:33,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:51:33,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:51:33,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:51:33,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:51:33,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:51:33,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:51:33,465 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 11:51:33,465 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:51:33,465 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:51:33,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:51:33,466 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:51:33,466 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 11:51:33,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:51:33,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:51:33,466 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:51:33,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:51:33,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:51:33,683 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:51:33,684 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 11:51:33,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:51:33 BoogieIcfgContainer [2020-07-21 11:51:33,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:51:33,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:51:33,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:51:33,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:51:33,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:51:33" (1/3) ... [2020-07-21 11:51:33,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17093661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:51:33, skipping insertion in model container [2020-07-21 11:51:33,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:51:33" (2/3) ... [2020-07-21 11:51:33,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17093661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:51:33, skipping insertion in model container [2020-07-21 11:51:33,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:51:33" (3/3) ... [2020-07-21 11:51:33,696 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2020-07-21 11:51:33,708 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:51:33,715 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:51:33,730 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:51:33,794 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:51:33,794 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:51:33,794 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:51:33,795 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:51:33,795 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:51:33,795 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:51:33,798 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:51:33,798 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:51:33,832 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-07-21 11:51:33,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 11:51:33,838 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:51:33,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:51:33,840 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:51:33,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:51:33,846 INFO L82 PathProgramCache]: Analyzing trace with hash -917653371, now seen corresponding path program 1 times [2020-07-21 11:51:33,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:51:33,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384615379] [2020-07-21 11:51:33,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:51:33,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:51:33,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:51:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:33,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:51:33,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384615379] [2020-07-21 11:51:33,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:51:33,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:51:33,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105344409] [2020-07-21 11:51:33,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:51:33,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:51:33,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:51:33,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:51:33,956 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-07-21 11:51:33,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:51:33,975 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-07-21 11:51:33,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:51:33,977 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-21 11:51:33,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:51:33,985 INFO L225 Difference]: With dead ends: 35 [2020-07-21 11:51:33,986 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 11:51:33,989 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 [2020-07-21 11:51:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 11:51:34,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 11:51:34,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 11:51:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-07-21 11:51:34,021 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-07-21 11:51:34,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:51:34,021 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-07-21 11:51:34,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:51:34,022 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-07-21 11:51:34,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 11:51:34,023 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:51:34,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:51:34,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:34,225 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:51:34,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:51:34,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1750778295, now seen corresponding path program 1 times [2020-07-21 11:51:34,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:51:34,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857470764] [2020-07-21 11:51:34,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:51:34,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:51:34,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:51:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:34,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:51:34,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857470764] [2020-07-21 11:51:34,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:51:34,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:51:34,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788188842] [2020-07-21 11:51:34,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:51:34,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:51:34,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:51:34,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:51:34,301 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-07-21 11:51:34,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:51:34,317 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-07-21 11:51:34,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:51:34,318 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-21 11:51:34,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:51:34,319 INFO L225 Difference]: With dead ends: 24 [2020-07-21 11:51:34,319 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 11:51:34,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:51:34,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 11:51:34,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 11:51:34,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 11:51:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 11:51:34,325 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2020-07-21 11:51:34,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:51:34,325 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 11:51:34,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:51:34,326 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 11:51:34,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 11:51:34,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:51:34,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:51:34,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:34,528 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:51:34,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:51:34,530 INFO L82 PathProgramCache]: Analyzing trace with hash -941431669, now seen corresponding path program 1 times [2020-07-21 11:51:34,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:51:34,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490046897] [2020-07-21 11:51:34,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:51:34,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 11:51:34,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:51:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:34,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:51:34,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490046897] [2020-07-21 11:51:34,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:51:34,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:51:34,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405677394] [2020-07-21 11:51:34,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:51:34,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:51:34,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:51:34,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:51:34,647 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-21 11:51:34,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:51:34,688 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-07-21 11:51:34,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:51:34,689 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 11:51:34,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:51:34,690 INFO L225 Difference]: With dead ends: 23 [2020-07-21 11:51:34,690 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 11:51:34,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:51:34,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 11:51:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 11:51:34,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 11:51:34,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-07-21 11:51:34,697 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-07-21 11:51:34,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:51:34,697 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-07-21 11:51:34,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:51:34,698 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-07-21 11:51:34,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 11:51:34,699 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:51:34,699 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:51:34,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:34,912 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:51:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:51:34,913 INFO L82 PathProgramCache]: Analyzing trace with hash 447870728, now seen corresponding path program 1 times [2020-07-21 11:51:34,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:51:34,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887847676] [2020-07-21 11:51:34,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:51:34,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 11:51:34,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:51:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:34,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:51:34,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887847676] [2020-07-21 11:51:34,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:51:34,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 11:51:34,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560538457] [2020-07-21 11:51:34,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 11:51:34,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:51:34,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 11:51:34,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:51:34,971 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2020-07-21 11:51:34,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:51:34,999 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-07-21 11:51:35,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 11:51:35,000 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-21 11:51:35,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:51:35,002 INFO L225 Difference]: With dead ends: 31 [2020-07-21 11:51:35,002 INFO L226 Difference]: Without dead ends: 22 [2020-07-21 11:51:35,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 11:51:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-21 11:51:35,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-07-21 11:51:35,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 11:51:35,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 11:51:35,009 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-07-21 11:51:35,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:51:35,009 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 11:51:35,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 11:51:35,010 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 11:51:35,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 11:51:35,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:51:35,011 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:51:35,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:35,225 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:51:35,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:51:35,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1257217354, now seen corresponding path program 1 times [2020-07-21 11:51:35,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:51:35,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081594600] [2020-07-21 11:51:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 11:51:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:51:35,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:51:35,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:51:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:35,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:51:35,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:51:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:35,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081594600] [2020-07-21 11:51:35,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:51:35,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 11:51:35,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813022242] [2020-07-21 11:51:35,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 11:51:35,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:51:35,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 11:51:35,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-21 11:51:35,457 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2020-07-21 11:51:35,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:51:35,554 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-07-21 11:51:35,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 11:51:35,555 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-07-21 11:51:35,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:51:35,556 INFO L225 Difference]: With dead ends: 26 [2020-07-21 11:51:35,556 INFO L226 Difference]: Without dead ends: 20 [2020-07-21 11:51:35,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-07-21 11:51:35,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-21 11:51:35,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-21 11:51:35,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-21 11:51:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-21 11:51:35,561 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2020-07-21 11:51:35,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:51:35,562 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-21 11:51:35,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 11:51:35,562 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-21 11:51:35,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:51:35,563 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:51:35,563 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:51:35,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:35,764 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:51:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:51:35,764 INFO L82 PathProgramCache]: Analyzing trace with hash -2145316375, now seen corresponding path program 1 times [2020-07-21 11:51:35,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:51:35,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903867061] [2020-07-21 11:51:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 11:51:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:51:35,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-21 11:51:35,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:51:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:35,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:51:35,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:51:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:36,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903867061] [2020-07-21 11:51:36,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:51:36,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-21 11:51:36,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331761954] [2020-07-21 11:51:36,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 11:51:36,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:51:36,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 11:51:36,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-07-21 11:51:36,133 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 14 states. [2020-07-21 11:51:38,320 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 28 DAG size of output: 18 [2020-07-21 11:51:52,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:51:52,906 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-07-21 11:51:52,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 11:51:52,910 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2020-07-21 11:51:52,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:51:52,911 INFO L225 Difference]: With dead ends: 43 [2020-07-21 11:51:52,911 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 11:51:52,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=67, Invalid=273, Unknown=2, NotChecked=0, Total=342 [2020-07-21 11:51:52,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 11:51:52,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-21 11:51:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 11:51:52,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-07-21 11:51:52,918 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2020-07-21 11:51:52,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:51:52,919 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-07-21 11:51:52,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 11:51:52,919 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-07-21 11:51:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:51:52,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:51:52,920 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:51:53,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:53,122 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:51:53,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:51:53,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1504484118, now seen corresponding path program 2 times [2020-07-21 11:51:53,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:51:53,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323985299] [2020-07-21 11:51:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 11:51:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:51:53,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 11:51:53,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:51:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-21 11:51:53,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:51:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 11:51:53,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323985299] [2020-07-21 11:51:53,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 11:51:53,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-07-21 11:51:53,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022159207] [2020-07-21 11:51:53,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:51:53,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:51:53,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:51:53,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:51:53,224 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 3 states. [2020-07-21 11:51:53,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:51:53,236 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-07-21 11:51:53,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:51:53,237 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 11:51:53,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:51:53,238 INFO L225 Difference]: With dead ends: 40 [2020-07-21 11:51:53,240 INFO L226 Difference]: Without dead ends: 29 [2020-07-21 11:51:53,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:51:53,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-21 11:51:53,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-21 11:51:53,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 11:51:53,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-07-21 11:51:53,249 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 22 [2020-07-21 11:51:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:51:53,249 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-07-21 11:51:53,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:51:53,249 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-07-21 11:51:53,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 11:51:53,250 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:51:53,251 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:51:53,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:51:53,458 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:51:53,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:51:53,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1422910986, now seen corresponding path program 2 times [2020-07-21 11:51:53,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:51:53,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810233085] [2020-07-21 11:51:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-21 11:51:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:51:53,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-21 11:51:53,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:51:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:53,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:51:53,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:51:58,536 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:51:58,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810233085] [2020-07-21 11:51:58,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:51:58,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2020-07-21 11:51:58,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091083081] [2020-07-21 11:51:58,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 11:51:58,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:51:58,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 11:51:58,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=543, Unknown=2, NotChecked=0, Total=650 [2020-07-21 11:51:58,539 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 26 states. [2020-07-21 11:52:20,861 WARN L193 SmtUtils]: Spent 13.32 s on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 11:52:24,965 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ c_main_~a~0 3) 4294967296) (mod (+ (* c_main_~j~0 3) c_main_~b~0 (* c_main_~i~0 4294967293)) 4294967296)) (= (mod (+ (* c_main_~j~0 4) c_main_~b~0 (* c_main_~i~0 4294967292)) 4294967296) (mod (+ c_main_~a~0 4) 4294967296)) (= (mod (+ (* c_main_~j~0 2) c_main_~b~0 (* c_main_~i~0 4294967294)) 4294967296) (mod (+ c_main_~a~0 2) 4294967296)) (= (mod c_main_~a~0 4294967296) (mod c_main_~b~0 4294967296)) (= (mod (+ c_main_~j~0 c_main_~b~0 (* c_main_~i~0 4294967295)) 4294967296) (mod (+ c_main_~a~0 1) 4294967296))) is different from false [2020-07-21 11:52:45,896 WARN L193 SmtUtils]: Spent 8.56 s on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:53:04,899 WARN L193 SmtUtils]: Spent 10.35 s on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 11:53:34,237 WARN L193 SmtUtils]: Spent 6.17 s on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 11:53:57,154 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 11:55:11,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:55:11,348 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-07-21 11:55:11,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 11:55:11,350 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-07-21 11:55:11,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:55:11,351 INFO L225 Difference]: With dead ends: 61 [2020-07-21 11:55:11,351 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 11:55:11,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 126.0s TimeCoverageRelationStatistics Valid=212, Invalid=1016, Unknown=36, NotChecked=68, Total=1332 [2020-07-21 11:55:11,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 11:55:11,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-07-21 11:55:11,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 11:55:11,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-07-21 11:55:11,365 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 28 [2020-07-21 11:55:11,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:55:11,366 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-07-21 11:55:11,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 11:55:11,366 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-07-21 11:55:11,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-21 11:55:11,367 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:55:11,368 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:55:11,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:55:11,569 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:55:11,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:55:11,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1188694230, now seen corresponding path program 3 times [2020-07-21 11:55:11,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:55:11,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633917234] [2020-07-21 11:55:11,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:55:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:55:11,634 WARN L261 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 95 conjunts are in the unsatisfiable core [2020-07-21 11:55:11,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:55:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:55:12,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:55:12,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:55:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 184 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:55:43,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633917234] [2020-07-21 11:55:43,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:55:43,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 50 [2020-07-21 11:55:43,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805536886] [2020-07-21 11:55:43,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-21 11:55:43,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:55:43,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-21 11:55:43,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=2091, Unknown=14, NotChecked=0, Total=2450 [2020-07-21 11:55:43,794 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 50 states. [2020-07-21 11:56:06,059 WARN L193 SmtUtils]: Spent 21.51 s on a formula simplification. DAG size of input: 122 DAG size of output: 56 [2020-07-21 11:56:19,255 WARN L193 SmtUtils]: Spent 10.92 s on a formula simplification. DAG size of input: 117 DAG size of output: 30 [2020-07-21 11:56:43,316 WARN L193 SmtUtils]: Spent 21.83 s on a formula simplification. DAG size of input: 127 DAG size of output: 52 [2020-07-21 11:56:47,354 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ c_main_~a~0 10) 4294967296) (mod (+ (* c_main_~j~0 10) c_main_~b~0 (* c_main_~i~0 4294967286) 20) 4294967296)) (= (mod (+ c_main_~a~0 1) 4294967296) (mod (+ c_main_~j~0 c_main_~b~0 (* c_main_~i~0 4294967295) 2) 4294967296)) (= (mod (+ c_main_~a~0 7) 4294967296) (mod (+ (* c_main_~j~0 7) c_main_~b~0 (* c_main_~i~0 4294967289) 14) 4294967296)) (= (mod c_main_~a~0 4294967296) (mod c_main_~b~0 4294967296)) (= (mod (+ c_main_~a~0 6) 4294967296) (mod (+ (* c_main_~j~0 6) c_main_~b~0 (* c_main_~i~0 4294967290) 12) 4294967296)) (= (mod (+ c_main_~a~0 8) 4294967296) (mod (+ (* c_main_~j~0 8) c_main_~b~0 (* c_main_~i~0 4294967288) 16) 4294967296)) (= (mod (+ c_main_~a~0 5) 4294967296) (mod (+ (* c_main_~j~0 5) c_main_~b~0 (* c_main_~i~0 4294967291) 10) 4294967296)) (= (mod (+ (* c_main_~j~0 3) c_main_~b~0 (* c_main_~i~0 4294967293) 6) 4294967296) (mod (+ c_main_~a~0 3) 4294967296)) (= (mod (+ c_main_~a~0 2) 4294967296) (mod (+ (* c_main_~j~0 2) c_main_~b~0 (* c_main_~i~0 4294967294) 4) 4294967296)) (= (mod (+ (* c_main_~j~0 4) c_main_~b~0 (* c_main_~i~0 4294967292) 8) 4294967296) (mod (+ c_main_~a~0 4) 4294967296)) (= (mod (+ (* c_main_~j~0 9) c_main_~b~0 (* c_main_~i~0 4294967287) 18) 4294967296) (mod (+ c_main_~a~0 9) 4294967296))) is different from false [2020-07-21 11:56:49,381 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ (* c_main_~j~0 4) c_main_~b~0 (* c_main_~i~0 4294967292)) 4294967296) (mod (+ c_main_~a~0 4) 4294967296)) (= (mod (+ c_main_~a~0 6) 4294967296) (mod (+ (* c_main_~j~0 6) c_main_~b~0 (* c_main_~i~0 4294967290)) 4294967296)) (= (mod (+ c_main_~a~0 10) 4294967296) (mod (+ (* c_main_~j~0 10) c_main_~b~0 (* c_main_~i~0 4294967286)) 4294967296)) (= (mod c_main_~a~0 4294967296) (mod c_main_~b~0 4294967296)) (= (mod (+ c_main_~a~0 9) 4294967296) (mod (+ (* c_main_~j~0 9) c_main_~b~0 (* c_main_~i~0 4294967287)) 4294967296)) (= (mod (+ (* c_main_~j~0 8) c_main_~b~0 (* c_main_~i~0 4294967288)) 4294967296) (mod (+ c_main_~a~0 8) 4294967296)) (= (mod (+ c_main_~a~0 3) 4294967296) (mod (+ (* c_main_~j~0 3) c_main_~b~0 (* c_main_~i~0 4294967293)) 4294967296)) (= (mod (+ c_main_~a~0 1) 4294967296) (mod (+ c_main_~j~0 c_main_~b~0 (* c_main_~i~0 4294967295)) 4294967296)) (= (mod (+ c_main_~a~0 2) 4294967296) (mod (+ (* c_main_~j~0 2) c_main_~b~0 (* c_main_~i~0 4294967294)) 4294967296)) (= (mod (+ c_main_~a~0 5) 4294967296) (mod (+ (* c_main_~j~0 5) c_main_~b~0 (* c_main_~i~0 4294967291)) 4294967296)) (= (mod (+ (* c_main_~j~0 7) c_main_~b~0 (* c_main_~i~0 4294967289)) 4294967296) (mod (+ c_main_~a~0 7) 4294967296))) is different from false [2020-07-21 11:57:54,505 WARN L193 SmtUtils]: Spent 28.68 s on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 11:59:20,814 WARN L193 SmtUtils]: Spent 49.95 s on a formula simplification. DAG size of input: 108 DAG size of output: 97 [2020-07-21 11:59:34,964 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ c_main_~a~0 1) 4294967296) (mod (+ c_main_~j~0 c_main_~b~0 (* c_main_~i~0 4294967295) 2) 4294967296)) (= (mod (+ c_main_~a~0 7) 4294967296) (mod (+ (* c_main_~j~0 7) c_main_~b~0 (* c_main_~i~0 4294967289) 14) 4294967296)) (= (mod c_main_~a~0 4294967296) (mod c_main_~b~0 4294967296)) (= (mod (+ c_main_~a~0 6) 4294967296) (mod (+ (* c_main_~j~0 6) c_main_~b~0 (* c_main_~i~0 4294967290) 12) 4294967296)) (= (mod (+ c_main_~a~0 8) 4294967296) (mod (+ (* c_main_~j~0 8) c_main_~b~0 (* c_main_~i~0 4294967288) 16) 4294967296)) (= (mod (+ c_main_~a~0 5) 4294967296) (mod (+ (* c_main_~j~0 5) c_main_~b~0 (* c_main_~i~0 4294967291) 10) 4294967296)) (= (mod (+ (* c_main_~j~0 3) c_main_~b~0 (* c_main_~i~0 4294967293) 6) 4294967296) (mod (+ c_main_~a~0 3) 4294967296)) (= (mod (+ c_main_~a~0 2) 4294967296) (mod (+ (* c_main_~j~0 2) c_main_~b~0 (* c_main_~i~0 4294967294) 4) 4294967296)) (= (mod (+ (* c_main_~j~0 4) c_main_~b~0 (* c_main_~i~0 4294967292) 8) 4294967296) (mod (+ c_main_~a~0 4) 4294967296))) is different from false [2020-07-21 11:59:41,019 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ (* c_main_~j~0 4) c_main_~b~0 (* c_main_~i~0 4294967292)) 4294967296) (mod (+ c_main_~a~0 4) 4294967296)) (= (mod (+ c_main_~a~0 6) 4294967296) (mod (+ (* c_main_~j~0 6) c_main_~b~0 (* c_main_~i~0 4294967290)) 4294967296)) (= (mod c_main_~a~0 4294967296) (mod c_main_~b~0 4294967296)) (= (mod (+ (* c_main_~j~0 8) c_main_~b~0 (* c_main_~i~0 4294967288)) 4294967296) (mod (+ c_main_~a~0 8) 4294967296)) (= (mod (+ c_main_~a~0 3) 4294967296) (mod (+ (* c_main_~j~0 3) c_main_~b~0 (* c_main_~i~0 4294967293)) 4294967296)) (= (mod (+ c_main_~a~0 1) 4294967296) (mod (+ c_main_~j~0 c_main_~b~0 (* c_main_~i~0 4294967295)) 4294967296)) (= (mod (+ c_main_~a~0 2) 4294967296) (mod (+ (* c_main_~j~0 2) c_main_~b~0 (* c_main_~i~0 4294967294)) 4294967296)) (= (mod (+ c_main_~a~0 5) 4294967296) (mod (+ (* c_main_~j~0 5) c_main_~b~0 (* c_main_~i~0 4294967291)) 4294967296)) (= (mod (+ (* c_main_~j~0 7) c_main_~b~0 (* c_main_~i~0 4294967289)) 4294967296) (mod (+ c_main_~a~0 7) 4294967296))) is different from false [2020-07-21 12:00:36,684 WARN L193 SmtUtils]: Spent 24.88 s on a formula simplification that was a NOOP. DAG size: 90 [2020-07-21 12:01:51,071 WARN L193 SmtUtils]: Spent 25.38 s on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 12:02:17,674 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (+ c_main_~a~0 1) 4294967296) (mod (+ c_main_~j~0 c_main_~b~0 (* c_main_~i~0 4294967295) 2) 4294967296)) (= (mod c_main_~a~0 4294967296) (mod c_main_~b~0 4294967296)) (= (mod (+ c_main_~a~0 6) 4294967296) (mod (+ (* c_main_~j~0 6) c_main_~b~0 (* c_main_~i~0 4294967290) 12) 4294967296)) (= (mod (+ c_main_~a~0 5) 4294967296) (mod (+ (* c_main_~j~0 5) c_main_~b~0 (* c_main_~i~0 4294967291) 10) 4294967296)) (= (mod (+ (* c_main_~j~0 3) c_main_~b~0 (* c_main_~i~0 4294967293) 6) 4294967296) (mod (+ c_main_~a~0 3) 4294967296)) (= (mod (+ c_main_~a~0 2) 4294967296) (mod (+ (* c_main_~j~0 2) c_main_~b~0 (* c_main_~i~0 4294967294) 4) 4294967296)) (= (mod (+ (* c_main_~j~0 4) c_main_~b~0 (* c_main_~i~0 4294967292) 8) 4294967296) (mod (+ c_main_~a~0 4) 4294967296))) is different from false [2020-07-21 12:03:19,086 WARN L193 SmtUtils]: Spent 18.17 s on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 12:04:32,320 WARN L193 SmtUtils]: Spent 14.76 s on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 12:05:36,837 WARN L193 SmtUtils]: Spent 17.02 s on a formula simplification that was a NOOP. DAG size: 64