/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:34:47,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:34:47,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:34:47,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:34:47,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:34:47,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:34:47,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:34:47,851 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:34:47,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:34:47,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:34:47,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:34:47,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:34:47,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:34:47,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:34:47,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:34:47,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:34:47,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:34:47,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:34:47,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:34:47,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:34:47,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:34:47,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:34:47,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:34:47,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:34:47,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:34:47,885 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 [2020-07-07 11:34:47,905 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:34:47,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:34:47,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:34:47,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:34:47,907 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:34:47,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:34:47,907 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:34:47,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:34:47,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:34:47,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:34:47,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:34:47,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:34:47,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:34:47,909 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:34:47,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:34:47,910 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:34:47,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:34:47,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:34:47,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:34:47,911 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:34:47,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:34:47,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:34:47,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:34:47,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:34:47,912 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:34:47,912 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:34:47,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:34:47,913 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:34:47,913 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:34:47,913 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:34:48,171 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:34:48,188 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:34:48,191 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:34:48,192 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:34:48,192 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:34:48,193 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps3.c [2020-07-07 11:34:48,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de12535de/eaedf12ea3ef481f9bc0ea53c83a749d/FLAG117751e77 [2020-07-07 11:34:48,859 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:34:48,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps3.c [2020-07-07 11:34:48,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de12535de/eaedf12ea3ef481f9bc0ea53c83a749d/FLAG117751e77 [2020-07-07 11:34:49,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de12535de/eaedf12ea3ef481f9bc0ea53c83a749d [2020-07-07 11:34:49,190 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:34:49,192 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:34:49,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:34:49,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:34:49,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:34:49,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:34:49" (1/1) ... [2020-07-07 11:34:49,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@122c3cbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:49, skipping insertion in model container [2020-07-07 11:34:49,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:34:49" (1/1) ... [2020-07-07 11:34:49,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:34:49,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:34:49,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:34:49,427 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:34:49,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:34:49,463 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:34:49,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:49 WrapperNode [2020-07-07 11:34:49,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:34:49,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:34:49,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:34:49,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:34:49,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:49" (1/1) ... [2020-07-07 11:34:49,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:49" (1/1) ... [2020-07-07 11:34:49,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:49" (1/1) ... [2020-07-07 11:34:49,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:49" (1/1) ... [2020-07-07 11:34:49,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:49" (1/1) ... [2020-07-07 11:34:49,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:49" (1/1) ... [2020-07-07 11:34:49,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:49" (1/1) ... [2020-07-07 11:34:49,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:34:49,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:34:49,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:34:49,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:34:49,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:49" (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 [2020-07-07 11:34:49,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:34:49,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:34:49,679 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 11:34:49,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 11:34:49,680 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:34:49,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:34:49,680 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:34:49,680 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:34:49,680 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 11:34:49,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 11:34:49,681 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:34:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:34:49,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:34:49,925 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:34:49,928 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 11:34:49,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:34:49 BoogieIcfgContainer [2020-07-07 11:34:49,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:34:49,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:34:49,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:34:49,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:34:49,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:34:49" (1/3) ... [2020-07-07 11:34:49,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d006147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:34:49, skipping insertion in model container [2020-07-07 11:34:49,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:34:49" (2/3) ... [2020-07-07 11:34:49,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d006147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:34:49, skipping insertion in model container [2020-07-07 11:34:49,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:34:49" (3/3) ... [2020-07-07 11:34:49,958 INFO L109 eAbstractionObserver]: Analyzing ICFG ps3.c [2020-07-07 11:34:49,982 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:34:49,996 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:34:50,023 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:34:50,050 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:34:50,051 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:34:50,051 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:34:50,051 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:34:50,051 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:34:50,051 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:34:50,051 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:34:50,051 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:34:50,067 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-07 11:34:50,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-07 11:34:50,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:50,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:50,074 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:50,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:50,080 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-07 11:34:50,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:50,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626964343] [2020-07-07 11:34:50,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:34:50,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626964343] [2020-07-07 11:34:50,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:34:50,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-07 11:34:50,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009353923] [2020-07-07 11:34:50,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-07 11:34:50,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:50,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-07 11:34:50,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 11:34:50,238 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-07 11:34:50,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:50,260 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-07 11:34:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-07 11:34:50,261 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-07 11:34:50,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:50,269 INFO L225 Difference]: With dead ends: 35 [2020-07-07 11:34:50,269 INFO L226 Difference]: Without dead ends: 15 [2020-07-07 11:34:50,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 11:34:50,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-07 11:34:50,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-07 11:34:50,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-07 11:34:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-07 11:34:50,305 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-07 11:34:50,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:50,306 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-07 11:34:50,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-07 11:34:50,306 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-07 11:34:50,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-07 11:34:50,307 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:50,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:50,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:34:50,308 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:50,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:50,309 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-07 11:34:50,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:50,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482501361] [2020-07-07 11:34:50,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:50,317 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:34:50,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418965395] [2020-07-07 11:34:50,318 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:50,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:50,375 INFO L264 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 11:34:50,380 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:34:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:34:50,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482501361] [2020-07-07 11:34:50,459 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:34:50,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418965395] [2020-07-07 11:34:50,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:34:50,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:34:50,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015274973] [2020-07-07 11:34:50,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:34:50,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:50,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:34:50,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:34:50,464 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-07 11:34:50,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:50,536 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-07 11:34:50,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:34:50,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-07 11:34:50,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:50,538 INFO L225 Difference]: With dead ends: 25 [2020-07-07 11:34:50,538 INFO L226 Difference]: Without dead ends: 22 [2020-07-07 11:34:50,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:34:50,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-07 11:34:50,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-07 11:34:50,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-07 11:34:50,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-07 11:34:50,547 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-07 11:34:50,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:50,547 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-07 11:34:50,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:34:50,548 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-07 11:34:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-07 11:34:50,548 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:50,549 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:50,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:34:50,764 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:50,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:50,765 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-07 11:34:50,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:50,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767625679] [2020-07-07 11:34:50,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:50,773 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:34:50,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350041341] [2020-07-07 11:34:50,774 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:34:50,817 INFO L264 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-07 11:34:50,821 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:34:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:34:50,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767625679] [2020-07-07 11:34:50,886 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:34:50,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350041341] [2020-07-07 11:34:50,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:34:50,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-07 11:34:50,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417101504] [2020-07-07 11:34:50,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:34:50,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:50,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:34:50,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:34:50,889 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 6 states. [2020-07-07 11:34:50,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:50,983 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-07 11:34:50,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:34:50,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-07-07 11:34:50,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:50,986 INFO L225 Difference]: With dead ends: 32 [2020-07-07 11:34:50,987 INFO L226 Difference]: Without dead ends: 29 [2020-07-07 11:34:50,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:34:50,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-07 11:34:50,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-07 11:34:50,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-07 11:34:51,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-07-07 11:34:51,000 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2020-07-07 11:34:51,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:51,001 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-07-07 11:34:51,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:34:51,001 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-07-07 11:34:51,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 11:34:51,003 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:51,003 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:51,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:51,218 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:51,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:51,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-07 11:34:51,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:51,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556959789] [2020-07-07 11:34:51,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:51,226 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:34:51,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6851375] [2020-07-07 11:34:51,227 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:51,274 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:34:51,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:34:51,276 INFO L264 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-07 11:34:51,278 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:34:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:34:51,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556959789] [2020-07-07 11:34:51,398 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-07-07 11:34:51,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6851375] [2020-07-07 11:34:51,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:34:51,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-07 11:34:51,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923797470] [2020-07-07 11:34:51,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:34:51,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:34:51,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:34:51,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:34:51,401 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2020-07-07 11:34:51,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:34:51,629 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-07 11:34:51,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:34:51,631 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-07-07 11:34:51,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:34:51,632 INFO L225 Difference]: With dead ends: 39 [2020-07-07 11:34:51,635 INFO L226 Difference]: Without dead ends: 36 [2020-07-07 11:34:51,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:34:51,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-07 11:34:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-07 11:34:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 11:34:51,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-07 11:34:51,655 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 24 [2020-07-07 11:34:51,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:34:51,657 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-07 11:34:51,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:34:51,657 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-07 11:34:51,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-07 11:34:51,658 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:34:51,658 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:34:51,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:34:51,866 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:34:51,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:34:51,867 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-07 11:34:51,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:34:51,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468314302] [2020-07-07 11:34:51,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:34:51,874 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-07 11:34:51,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792509450] [2020-07-07 11:34:51,875 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true