/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/bitvector-loops/diamond_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 10:45:50,309 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:45:50,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:45:50,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:45:50,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:45:50,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:45:50,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:45:50,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:45:50,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:45:50,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:45:50,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:45:50,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:45:50,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:45:50,335 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:45:50,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:45:50,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:45:50,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:45:50,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:45:50,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:45:50,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:45:50,344 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:45:50,345 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:45:50,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:45:50,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:45:50,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:45:50,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:45:50,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:45:50,359 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:45:50,359 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 10:45:50,383 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:45:50,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:45:50,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:45:50,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:45:50,386 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:45:50,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:45:50,387 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:45:50,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:45:50,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:45:50,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:45:50,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:45:50,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:45:50,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:45:50,389 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:45:50,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:45:50,389 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:45:50,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:45:50,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:45:50,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:45:50,390 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:45:50,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:45:50,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:45:50,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:45:50,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:45:50,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:45:50,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:45:50,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:50,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:45:50,392 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:45:50,392 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 [2020-07-20 10:45:50,663 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:45:50,675 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:45:50,678 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:45:50,680 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:45:50,680 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:45:50,681 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-07-20 10:45:50,744 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0509f3d4/adbf3e9b251740fa862aca909b7a710d/FLAGdd10df96b [2020-07-20 10:45:51,186 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:45:51,187 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-07-20 10:45:51,195 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0509f3d4/adbf3e9b251740fa862aca909b7a710d/FLAGdd10df96b [2020-07-20 10:45:51,553 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0509f3d4/adbf3e9b251740fa862aca909b7a710d [2020-07-20 10:45:51,561 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:45:51,564 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:45:51,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:51,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:45:51,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:45:51,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:51" (1/1) ... [2020-07-20 10:45:51,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66a350d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:51, skipping insertion in model container [2020-07-20 10:45:51,574 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:51" (1/1) ... [2020-07-20 10:45:51,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:45:51,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:45:51,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:51,785 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:45:51,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:51,823 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:45:51,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:51 WrapperNode [2020-07-20 10:45:51,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:51,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:45:51,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:45:51,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:45:51,926 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:51" (1/1) ... [2020-07-20 10:45:51,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:51" (1/1) ... [2020-07-20 10:45:51,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:51" (1/1) ... [2020-07-20 10:45:51,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:51" (1/1) ... [2020-07-20 10:45:51,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:51" (1/1) ... [2020-07-20 10:45:51,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:51" (1/1) ... [2020-07-20 10:45:51,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:51" (1/1) ... [2020-07-20 10:45:51,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:45:51,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:45:51,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:45:51,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:45:51,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:51" (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 10:45:52,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:45:52,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:45:52,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 10:45:52,040 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:45:52,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:45:52,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 10:45:52,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 10:45:52,042 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:45:52,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:45:52,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:45:52,312 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:45:52,312 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 10:45:52,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:52 BoogieIcfgContainer [2020-07-20 10:45:52,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:45:52,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:45:52,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:45:52,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:45:52,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:45:51" (1/3) ... [2020-07-20 10:45:52,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d128b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:52, skipping insertion in model container [2020-07-20 10:45:52,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:51" (2/3) ... [2020-07-20 10:45:52,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d128b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:52, skipping insertion in model container [2020-07-20 10:45:52,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:52" (3/3) ... [2020-07-20 10:45:52,323 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-07-20 10:45:52,333 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:45:52,340 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:45:52,353 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:45:52,375 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:45:52,375 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:45:52,376 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:45:52,376 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:45:52,376 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:45:52,376 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:45:52,376 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:45:52,377 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:45:52,397 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-20 10:45:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 10:45:52,403 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:52,404 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:52,405 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:52,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:52,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1906239810, now seen corresponding path program 1 times [2020-07-20 10:45:52,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:52,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489044200] [2020-07-20 10:45:52,421 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 [2020-07-20 10:45:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:52,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 10:45:52,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:52,534 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 10:45:52,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:52,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489044200] [2020-07-20 10:45:52,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:52,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 10:45:52,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626422537] [2020-07-20 10:45:52,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 10:45:52,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:52,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 10:45:52,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 10:45:52,570 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-07-20 10:45:52,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:52,591 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2020-07-20 10:45:52,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 10:45:52,593 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 10:45:52,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:52,600 INFO L225 Difference]: With dead ends: 38 [2020-07-20 10:45:52,600 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 10:45:52,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 10:45:52,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 10:45:52,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 10:45:52,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 10:45:52,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions. [2020-07-20 10:45:52,637 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 10 [2020-07-20 10:45:52,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:52,638 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 31 transitions. [2020-07-20 10:45:52,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 10:45:52,638 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions. [2020-07-20 10:45:52,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 10:45:52,639 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:52,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:52,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:52,854 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:52,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1847134466, now seen corresponding path program 1 times [2020-07-20 10:45:52,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:52,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147761982] [2020-07-20 10:45:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:45:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:52,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 10:45:52,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:52,935 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 10:45:52,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:52,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147761982] [2020-07-20 10:45:52,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:52,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 10:45:52,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838483477] [2020-07-20 10:45:52,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 10:45:52,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:52,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 10:45:52,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 10:45:52,943 INFO L87 Difference]: Start difference. First operand 21 states and 31 transitions. Second operand 3 states. [2020-07-20 10:45:53,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:53,094 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2020-07-20 10:45:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 10:45:53,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-20 10:45:53,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:53,100 INFO L225 Difference]: With dead ends: 28 [2020-07-20 10:45:53,101 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 10:45:53,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 10:45:53,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 10:45:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-07-20 10:45:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 10:45:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2020-07-20 10:45:53,124 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 10 [2020-07-20 10:45:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:53,125 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2020-07-20 10:45:53,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 10:45:53,125 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2020-07-20 10:45:53,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 10:45:53,127 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:53,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:53,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:53,341 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:53,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:53,342 INFO L82 PathProgramCache]: Analyzing trace with hash -129940435, now seen corresponding path program 1 times [2020-07-20 10:45:53,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:53,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452273328] [2020-07-20 10:45:53,344 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 [2020-07-20 10:45:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:53,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 10:45:53,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:53,443 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 10:45:53,446 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-20 10:45:53,455 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-07-20 10:45:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 10:45:53,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:53,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452273328] [2020-07-20 10:45:53,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:53,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 10:45:53,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206013732] [2020-07-20 10:45:53,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 10:45:53,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:53,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 10:45:53,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 10:45:53,479 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand 3 states. [2020-07-20 10:45:53,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:53,581 INFO L93 Difference]: Finished difference Result 50 states and 81 transitions. [2020-07-20 10:45:53,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 10:45:53,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 10:45:53,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:53,584 INFO L225 Difference]: With dead ends: 50 [2020-07-20 10:45:53,584 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 10:45:53,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 10:45:53,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 10:45:53,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-20 10:45:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 10:45:53,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2020-07-20 10:45:53,592 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 21 [2020-07-20 10:45:53,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:53,593 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2020-07-20 10:45:53,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 10:45:53,593 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2020-07-20 10:45:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 10:45:53,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:53,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:45:53,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:53,795 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:53,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:53,796 INFO L82 PathProgramCache]: Analyzing trace with hash 263086575, now seen corresponding path program 1 times [2020-07-20 10:45:53,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:53,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208023821] [2020-07-20 10:45:53,798 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 [2020-07-20 10:45:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:53,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 10:45:53,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:54,056 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 10:45:54,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:58,681 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 10:45:58,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208023821] [2020-07-20 10:45:58,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:45:58,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-20 10:45:58,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405311737] [2020-07-20 10:45:58,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 10:45:58,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:58,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 10:45:58,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=384, Unknown=2, NotChecked=0, Total=552 [2020-07-20 10:45:58,686 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 24 states. [2020-07-20 10:46:01,797 WARN L193 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 56 DAG size of output: 11 [2020-07-20 10:46:02,201 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 11 [2020-07-20 10:46:03,627 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 13 [2020-07-20 10:46:06,287 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 11 [2020-07-20 10:46:08,917 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 11 [2020-07-20 10:46:12,004 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 13 [2020-07-20 10:46:16,161 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ c_main_~x~0 8) 4294967296) 99) (< (mod (+ c_main_~x~0 4) 4294967296) 99) (< (mod (+ c_main_~x~0 10) 4294967296) 99) (< (mod c_main_~x~0 4294967296) 99) (< (mod (+ c_main_~x~0 6) 4294967296) 99) (< (mod (+ c_main_~x~0 2) 4294967296) 99)) is different from false [2020-07-20 10:46:21,604 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 13 [2020-07-20 10:46:30,633 WARN L193 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 43 DAG size of output: 13 [2020-07-20 10:46:44,592 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2020-07-20 10:46:49,460 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2020-07-20 10:46:49,855 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 13 [2020-07-20 10:46:52,489 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 11 [2020-07-20 10:47:01,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:47:01,321 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2020-07-20 10:47:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 10:47:01,321 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 21 [2020-07-20 10:47:01,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:47:01,323 INFO L225 Difference]: With dead ends: 87 [2020-07-20 10:47:01,323 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 10:47:01,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 46.9s TimeCoverageRelationStatistics Valid=461, Invalid=795, Unknown=8, NotChecked=68, Total=1332 [2020-07-20 10:47:01,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 10:47:01,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2020-07-20 10:47:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 10:47:01,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2020-07-20 10:47:01,336 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 21 [2020-07-20 10:47:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:47:01,336 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2020-07-20 10:47:01,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 10:47:01,336 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2020-07-20 10:47:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 10:47:01,337 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:47:01,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:47:01,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:01,551 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:47:01,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:47:01,552 INFO L82 PathProgramCache]: Analyzing trace with hash -402778255, now seen corresponding path program 1 times [2020-07-20 10:47:01,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:47:01,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119004957] [2020-07-20 10:47:01,554 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 [2020-07-20 10:47:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:47:01,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 10:47:01,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:47:01,606 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 10:47:01,608 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 10:47:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 10:47:01,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:47:01,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119004957] [2020-07-20 10:47:01,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:47:01,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 10:47:01,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141254065] [2020-07-20 10:47:01,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 10:47:01,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:47:01,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 10:47:01,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 10:47:01,634 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 3 states. [2020-07-20 10:47:01,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:47:01,715 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-07-20 10:47:01,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 10:47:01,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-20 10:47:01,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:47:01,717 INFO L225 Difference]: With dead ends: 83 [2020-07-20 10:47:01,717 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 10:47:01,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 10:47:01,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 10:47:01,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-07-20 10:47:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 10:47:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-07-20 10:47:01,730 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 21 [2020-07-20 10:47:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:47:01,731 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-07-20 10:47:01,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 10:47:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-07-20 10:47:01,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 10:47:01,734 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:47:01,734 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:47:01,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:01,949 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:47:01,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:47:01,950 INFO L82 PathProgramCache]: Analyzing trace with hash -345519953, now seen corresponding path program 1 times [2020-07-20 10:47:01,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:47:01,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494349042] [2020-07-20 10:47:01,951 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 [2020-07-20 10:47:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:47:01,976 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:47:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 10:47:01,984 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 10:47:02,009 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 10:47:02,009 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 10:47:02,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:02,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:47:02 BoogieIcfgContainer [2020-07-20 10:47:02,246 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 10:47:02,248 INFO L168 Benchmark]: Toolchain (without parser) took 70685.21 ms. Allocated memory was 146.3 MB in the beginning and 245.4 MB in the end (delta: 99.1 MB). Free memory was 102.4 MB in the beginning and 218.2 MB in the end (delta: -115.8 MB). Peak memory consumption was 102.6 MB. Max. memory is 7.1 GB. [2020-07-20 10:47:02,249 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 146.3 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 10:47:02,250 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.24 ms. Allocated memory is still 146.3 MB. Free memory was 101.9 MB in the beginning and 91.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 10:47:02,251 INFO L168 Benchmark]: Boogie Preprocessor took 144.76 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 91.9 MB in the beginning and 181.6 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 10:47:02,251 INFO L168 Benchmark]: RCFGBuilder took 345.41 ms. Allocated memory is still 203.4 MB. Free memory was 181.0 MB in the beginning and 165.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. [2020-07-20 10:47:02,252 INFO L168 Benchmark]: TraceAbstraction took 69929.53 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 165.2 MB in the beginning and 218.2 MB in the end (delta: -53.0 MB). Peak memory consumption was 108.3 MB. Max. memory is 7.1 GB. [2020-07-20 10:47:02,256 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 146.3 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 259.24 ms. Allocated memory is still 146.3 MB. Free memory was 101.9 MB in the beginning and 91.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 144.76 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 91.9 MB in the beginning and 181.6 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 345.41 ms. Allocated memory is still 203.4 MB. Free memory was 181.0 MB in the beginning and 165.2 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 69929.53 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 165.2 MB in the beginning and 218.2 MB in the end (delta: -53.0 MB). Peak memory consumption was 108.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int x = 0; [L13] unsigned int y = __VERIFIER_nondet_uint(); [L15] COND TRUE x < 99 VAL [x=0, y=3] [L16] COND FALSE !(y % 2 == 0) [L17] x += 2 VAL [x=2, y=3] [L19] COND FALSE !(y % 2 == 0) [L20] x -= 2 VAL [x=0, y=3] [L22] COND FALSE !(y % 2 == 0) [L23] x += 2 VAL [x=2, y=3] [L25] COND FALSE !(y % 2 == 0) [L26] x -= 2 VAL [x=0, y=3] [L28] COND FALSE !(y % 2 == 0) [L29] x += 2 VAL [x=2, y=3] [L31] COND FALSE !(y % 2 == 0) [L32] x -= 4 VAL [x=4294967294, y=3] [L34] COND FALSE !(y % 2 == 0) [L35] x += 4 VAL [x=2, y=3] [L37] COND FALSE !(y % 2 == 0) [L38] x += 2 VAL [x=4, y=3] [L40] COND FALSE !(y % 2 == 0) [L41] x -= 4 VAL [x=0, y=3] [L43] COND FALSE !(y % 2 == 0) [L44] x -= 4 VAL [x=4294967292, y=3] [L15] COND FALSE !(x < 99) VAL [x=4294967292, y=3] [L47] CALL __VERIFIER_assert((x % 2) == (y % 2)) VAL [\old(cond)=0] [L5] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L6] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 69.8s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 63.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 54 SDslu, 124 SDs, 0 SdLazy, 525 SolverSat, 416 SolverUnsat, 9 SolverUnknown, 0 SolverNotchecked, 19.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 47.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 30 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 4960 SizeOfPredicates, 4 NumberOfNonLiveVariables, 233 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...