/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-18 06:33:51,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-18 06:33:51,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-18 06:33:51,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-18 06:33:51,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-18 06:33:51,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-18 06:33:51,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-18 06:33:51,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-18 06:33:51,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-18 06:33:51,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-18 06:33:51,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-18 06:33:51,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-18 06:33:51,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-18 06:33:51,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-18 06:33:51,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-18 06:33:51,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-18 06:33:51,136 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-18 06:33:51,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-18 06:33:51,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-18 06:33:51,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-18 06:33:51,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-18 06:33:51,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-18 06:33:51,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-18 06:33:51,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-18 06:33:51,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-18 06:33:51,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-18 06:33:51,167 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-18 06:33:51,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-18 06:33:51,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-18 06:33:51,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-18 06:33:51,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-18 06:33:51,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-18 06:33:51,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-18 06:33:51,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-18 06:33:51,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-18 06:33:51,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-18 06:33:51,177 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-18 06:33:51,206 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-18 06:33:51,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-18 06:33:51,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-18 06:33:51,210 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-18 06:33:51,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-18 06:33:51,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-18 06:33:51,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-18 06:33:51,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-18 06:33:51,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-18 06:33:51,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-18 06:33:51,212 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-18 06:33:51,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-18 06:33:51,212 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-18 06:33:51,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-18 06:33:51,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-18 06:33:51,213 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-18 06:33:51,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-18 06:33:51,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-18 06:33:51,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-18 06:33:51,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-18 06:33:51,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-18 06:33:51,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-18 06:33:51,214 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-18 06:33:51,523 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-18 06:33:51,536 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-18 06:33:51,540 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-18 06:33:51,542 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-18 06:33:51,542 INFO L275 PluginConnector]: CDTParser initialized [2020-07-18 06:33:51,543 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-07-18 06:33:51,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03bea9431/f26adcd178d445ccb2237ce52bf30eac/FLAG50a1ab559 [2020-07-18 06:33:52,131 INFO L306 CDTParser]: Found 1 translation units. [2020-07-18 06:33:52,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-07-18 06:33:52,139 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03bea9431/f26adcd178d445ccb2237ce52bf30eac/FLAG50a1ab559 [2020-07-18 06:33:52,550 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03bea9431/f26adcd178d445ccb2237ce52bf30eac [2020-07-18 06:33:52,561 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-18 06:33:52,565 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-18 06:33:52,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-18 06:33:52,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-18 06:33:52,570 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-18 06:33:52,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 06:33:52" (1/1) ... [2020-07-18 06:33:52,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57bf06c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:33:52, skipping insertion in model container [2020-07-18 06:33:52,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.07 06:33:52" (1/1) ... [2020-07-18 06:33:52,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-18 06:33:52,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-18 06:33:52,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 06:33:52,788 INFO L203 MainTranslator]: Completed pre-run [2020-07-18 06:33:52,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-18 06:33:52,823 INFO L208 MainTranslator]: Completed translation [2020-07-18 06:33:52,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:33:52 WrapperNode [2020-07-18 06:33:52,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-18 06:33:52,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-18 06:33:52,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-18 06:33:52,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-18 06:33:52,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:33:52" (1/1) ... [2020-07-18 06:33:52,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:33:52" (1/1) ... [2020-07-18 06:33:52,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:33:52" (1/1) ... [2020-07-18 06:33:52,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:33:52" (1/1) ... [2020-07-18 06:33:52,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:33:52" (1/1) ... [2020-07-18 06:33:52,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:33:52" (1/1) ... [2020-07-18 06:33:52,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:33:52" (1/1) ... [2020-07-18 06:33:52,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-18 06:33:52,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-18 06:33:52,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-18 06:33:52,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-18 06:33:52,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:33:52" (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 [2020-07-18 06:33:53,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-18 06:33:53,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-18 06:33:53,025 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-18 06:33:53,025 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-18 06:33:53,025 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-18 06:33:53,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-18 06:33:53,025 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-18 06:33:53,026 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-18 06:33:53,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-18 06:33:53,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-18 06:33:53,026 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-18 06:33:53,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-18 06:33:53,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-18 06:33:53,336 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-18 06:33:53,336 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-18 06:33:53,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 06:33:53 BoogieIcfgContainer [2020-07-18 06:33:53,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-18 06:33:53,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-18 06:33:53,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-18 06:33:53,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-18 06:33:53,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.07 06:33:52" (1/3) ... [2020-07-18 06:33:53,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42076005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 06:33:53, skipping insertion in model container [2020-07-18 06:33:53,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.07 06:33:52" (2/3) ... [2020-07-18 06:33:53,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42076005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.07 06:33:53, skipping insertion in model container [2020-07-18 06:33:53,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.07 06:33:53" (3/3) ... [2020-07-18 06:33:53,349 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-07-18 06:33:53,362 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-18 06:33:53,370 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-18 06:33:53,388 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-18 06:33:53,413 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-18 06:33:53,413 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-18 06:33:53,413 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-18 06:33:53,413 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-18 06:33:53,413 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-18 06:33:53,414 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-18 06:33:53,414 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-18 06:33:53,414 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-18 06:33:53,433 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-07-18 06:33:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-18 06:33:53,444 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 06:33:53,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-18 06:33:53,446 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 06:33:53,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 06:33:53,453 INFO L82 PathProgramCache]: Analyzing trace with hash 546510172, now seen corresponding path program 1 times [2020-07-18 06:33:53,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 06:33:53,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757983832] [2020-07-18 06:33:53,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 06:33:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 06:33:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 06:33:53,609 INFO L280 TraceCheckUtils]: 0: Hoare triple {40#true} assume true; {40#true} is VALID [2020-07-18 06:33:53,610 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {40#true} {40#true} #66#return; {40#true} is VALID [2020-07-18 06:33:53,612 INFO L263 TraceCheckUtils]: 0: Hoare triple {40#true} call ULTIMATE.init(); {40#true} is VALID [2020-07-18 06:33:53,613 INFO L280 TraceCheckUtils]: 1: Hoare triple {40#true} assume true; {40#true} is VALID [2020-07-18 06:33:53,613 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {40#true} {40#true} #66#return; {40#true} is VALID [2020-07-18 06:33:53,614 INFO L263 TraceCheckUtils]: 3: Hoare triple {40#true} call #t~ret3 := main(); {40#true} is VALID [2020-07-18 06:33:53,614 INFO L280 TraceCheckUtils]: 4: Hoare triple {40#true} ~i~0 := 0; {40#true} is VALID [2020-07-18 06:33:53,614 INFO L280 TraceCheckUtils]: 5: Hoare triple {40#true} ~x~0 := 0; {40#true} is VALID [2020-07-18 06:33:53,615 INFO L280 TraceCheckUtils]: 6: Hoare triple {40#true} ~y~0 := 0; {40#true} is VALID [2020-07-18 06:33:53,615 INFO L280 TraceCheckUtils]: 7: Hoare triple {40#true} assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647; {40#true} is VALID [2020-07-18 06:33:53,616 INFO L280 TraceCheckUtils]: 8: Hoare triple {40#true} ~n~0 := #t~nondet0; {40#true} is VALID [2020-07-18 06:33:53,616 INFO L280 TraceCheckUtils]: 9: Hoare triple {40#true} havoc #t~nondet0; {40#true} is VALID [2020-07-18 06:33:53,616 INFO L280 TraceCheckUtils]: 10: Hoare triple {40#true} assume !!(~n~0 > 0); {40#true} is VALID [2020-07-18 06:33:53,620 INFO L280 TraceCheckUtils]: 11: Hoare triple {40#true} ~i~0 := 0; {40#true} is VALID [2020-07-18 06:33:53,623 INFO L280 TraceCheckUtils]: 12: Hoare triple {40#true} assume !true; {41#false} is VALID [2020-07-18 06:33:53,623 INFO L263 TraceCheckUtils]: 13: Hoare triple {41#false} call __VERIFIER_assert((if 0 == ~x~0 then 1 else 0)); {41#false} is VALID [2020-07-18 06:33:53,624 INFO L280 TraceCheckUtils]: 14: Hoare triple {41#false} ~cond := #in~cond; {41#false} is VALID [2020-07-18 06:33:53,624 INFO L280 TraceCheckUtils]: 15: Hoare triple {41#false} assume 0 == ~cond; {41#false} is VALID [2020-07-18 06:33:53,625 INFO L280 TraceCheckUtils]: 16: Hoare triple {41#false} assume !false; {41#false} is VALID [2020-07-18 06:33:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-18 06:33:53,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757983832] [2020-07-18 06:33:53,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-18 06:33:53,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-18 06:33:53,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53989180] [2020-07-18 06:33:53,638 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-07-18 06:33:53,642 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-18 06:33:53,646 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states. [2020-07-18 06:33:53,694 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 17 edges. 17 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 06:33:53,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-18 06:33:53,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-18 06:33:53,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-18 06:33:53,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-18 06:33:53,708 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2020-07-18 06:33:53,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 06:33:53,847 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2020-07-18 06:33:53,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-18 06:33:53,847 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-07-18 06:33:53,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-18 06:33:53,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-18 06:33:53,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 75 transitions. [2020-07-18 06:33:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-18 06:33:53,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 75 transitions. [2020-07-18 06:33:53,868 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states and 75 transitions. [2020-07-18 06:33:53,989 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 75 edges. 75 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 06:33:54,002 INFO L225 Difference]: With dead ends: 61 [2020-07-18 06:33:54,002 INFO L226 Difference]: Without dead ends: 31 [2020-07-18 06:33:54,006 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 [2020-07-18 06:33:54,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-18 06:33:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-18 06:33:54,067 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-18 06:33:54,068 INFO L82 GeneralOperation]: Start isEquivalent. First operand 31 states. Second operand 31 states. [2020-07-18 06:33:54,068 INFO L74 IsIncluded]: Start isIncluded. First operand 31 states. Second operand 31 states. [2020-07-18 06:33:54,069 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 31 states. [2020-07-18 06:33:54,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 06:33:54,075 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-07-18 06:33:54,076 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-07-18 06:33:54,076 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 06:33:54,077 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 06:33:54,077 INFO L74 IsIncluded]: Start isIncluded. First operand 31 states. Second operand 31 states. [2020-07-18 06:33:54,077 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 31 states. [2020-07-18 06:33:54,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 06:33:54,083 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-07-18 06:33:54,083 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-07-18 06:33:54,084 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 06:33:54,084 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 06:33:54,085 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-18 06:33:54,085 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-18 06:33:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-18 06:33:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-07-18 06:33:54,091 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2020-07-18 06:33:54,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-18 06:33:54,092 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-07-18 06:33:54,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-18 06:33:54,092 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 31 states and 33 transitions. [2020-07-18 06:33:54,148 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 33 edges. 33 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 06:33:54,148 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-07-18 06:33:54,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-18 06:33:54,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 06:33:54,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-18 06:33:54,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-18 06:33:54,150 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 06:33:54,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 06:33:54,151 INFO L82 PathProgramCache]: Analyzing trace with hash 528039752, now seen corresponding path program 1 times [2020-07-18 06:33:54,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 06:33:54,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652259981] [2020-07-18 06:33:54,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 06:33:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 06:33:54,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 06:33:54,230 INFO L280 TraceCheckUtils]: 0: Hoare triple {292#true} assume true; {292#true} is VALID [2020-07-18 06:33:54,231 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {292#true} {292#true} #66#return; {292#true} is VALID [2020-07-18 06:33:54,231 INFO L263 TraceCheckUtils]: 0: Hoare triple {292#true} call ULTIMATE.init(); {292#true} is VALID [2020-07-18 06:33:54,232 INFO L280 TraceCheckUtils]: 1: Hoare triple {292#true} assume true; {292#true} is VALID [2020-07-18 06:33:54,232 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {292#true} {292#true} #66#return; {292#true} is VALID [2020-07-18 06:33:54,232 INFO L263 TraceCheckUtils]: 3: Hoare triple {292#true} call #t~ret3 := main(); {292#true} is VALID [2020-07-18 06:33:54,233 INFO L280 TraceCheckUtils]: 4: Hoare triple {292#true} ~i~0 := 0; {292#true} is VALID [2020-07-18 06:33:54,233 INFO L280 TraceCheckUtils]: 5: Hoare triple {292#true} ~x~0 := 0; {292#true} is VALID [2020-07-18 06:33:54,233 INFO L280 TraceCheckUtils]: 6: Hoare triple {292#true} ~y~0 := 0; {292#true} is VALID [2020-07-18 06:33:54,234 INFO L280 TraceCheckUtils]: 7: Hoare triple {292#true} assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647; {292#true} is VALID [2020-07-18 06:33:54,234 INFO L280 TraceCheckUtils]: 8: Hoare triple {292#true} ~n~0 := #t~nondet0; {292#true} is VALID [2020-07-18 06:33:54,235 INFO L280 TraceCheckUtils]: 9: Hoare triple {292#true} havoc #t~nondet0; {292#true} is VALID [2020-07-18 06:33:54,236 INFO L280 TraceCheckUtils]: 10: Hoare triple {292#true} assume !!(~n~0 > 0); {296#(<= 1 main_~n~0)} is VALID [2020-07-18 06:33:54,251 INFO L280 TraceCheckUtils]: 11: Hoare triple {296#(<= 1 main_~n~0)} ~i~0 := 0; {297#(<= (+ main_~i~0 1) main_~n~0)} is VALID [2020-07-18 06:33:54,256 INFO L280 TraceCheckUtils]: 12: Hoare triple {297#(<= (+ main_~i~0 1) main_~n~0)} assume !(~i~0 < ~n~0); {293#false} is VALID [2020-07-18 06:33:54,256 INFO L263 TraceCheckUtils]: 13: Hoare triple {293#false} call __VERIFIER_assert((if 0 == ~x~0 then 1 else 0)); {293#false} is VALID [2020-07-18 06:33:54,256 INFO L280 TraceCheckUtils]: 14: Hoare triple {293#false} ~cond := #in~cond; {293#false} is VALID [2020-07-18 06:33:54,257 INFO L280 TraceCheckUtils]: 15: Hoare triple {293#false} assume 0 == ~cond; {293#false} is VALID [2020-07-18 06:33:54,257 INFO L280 TraceCheckUtils]: 16: Hoare triple {293#false} assume !false; {293#false} is VALID [2020-07-18 06:33:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-18 06:33:54,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652259981] [2020-07-18 06:33:54,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-18 06:33:54,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-18 06:33:54,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584643176] [2020-07-18 06:33:54,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-18 06:33:54,262 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-18 06:33:54,262 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states. [2020-07-18 06:33:54,284 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 17 edges. 17 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 06:33:54,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-18 06:33:54,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-18 06:33:54,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-18 06:33:54,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-18 06:33:54,285 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2020-07-18 06:33:54,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 06:33:54,444 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-18 06:33:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-18 06:33:54,444 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-07-18 06:33:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-18 06:33:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-07-18 06:33:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2020-07-18 06:33:54,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-07-18 06:33:54,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2020-07-18 06:33:54,451 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states and 41 transitions. [2020-07-18 06:33:54,505 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 41 edges. 41 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 06:33:54,507 INFO L225 Difference]: With dead ends: 39 [2020-07-18 06:33:54,507 INFO L226 Difference]: Without dead ends: 32 [2020-07-18 06:33:54,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-18 06:33:54,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-18 06:33:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-07-18 06:33:54,549 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-18 06:33:54,549 INFO L82 GeneralOperation]: Start isEquivalent. First operand 32 states. Second operand 32 states. [2020-07-18 06:33:54,549 INFO L74 IsIncluded]: Start isIncluded. First operand 32 states. Second operand 32 states. [2020-07-18 06:33:54,550 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 32 states. [2020-07-18 06:33:54,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 06:33:54,553 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-18 06:33:54,553 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-07-18 06:33:54,554 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 06:33:54,555 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 06:33:54,555 INFO L74 IsIncluded]: Start isIncluded. First operand 32 states. Second operand 32 states. [2020-07-18 06:33:54,555 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 32 states. [2020-07-18 06:33:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 06:33:54,558 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-18 06:33:54,559 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-07-18 06:33:54,559 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 06:33:54,560 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 06:33:54,560 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-18 06:33:54,560 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-18 06:33:54,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-18 06:33:54,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-07-18 06:33:54,563 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 17 [2020-07-18 06:33:54,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-18 06:33:54,564 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-07-18 06:33:54,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-18 06:33:54,564 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 32 states and 34 transitions. [2020-07-18 06:33:54,605 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 34 edges. 34 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 06:33:54,605 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-07-18 06:33:54,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-18 06:33:54,606 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 06:33:54,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-18 06:33:54,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-18 06:33:54,607 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 06:33:54,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 06:33:54,608 INFO L82 PathProgramCache]: Analyzing trace with hash -789875431, now seen corresponding path program 1 times [2020-07-18 06:33:54,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 06:33:54,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133670287] [2020-07-18 06:33:54,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 06:33:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 06:33:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 06:33:54,774 INFO L280 TraceCheckUtils]: 0: Hoare triple {508#true} assume true; {508#true} is VALID [2020-07-18 06:33:54,774 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {508#true} {508#true} #66#return; {508#true} is VALID [2020-07-18 06:33:54,775 INFO L263 TraceCheckUtils]: 0: Hoare triple {508#true} call ULTIMATE.init(); {508#true} is VALID [2020-07-18 06:33:54,776 INFO L280 TraceCheckUtils]: 1: Hoare triple {508#true} assume true; {508#true} is VALID [2020-07-18 06:33:54,777 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {508#true} {508#true} #66#return; {508#true} is VALID [2020-07-18 06:33:54,777 INFO L263 TraceCheckUtils]: 3: Hoare triple {508#true} call #t~ret3 := main(); {508#true} is VALID [2020-07-18 06:33:54,777 INFO L280 TraceCheckUtils]: 4: Hoare triple {508#true} ~i~0 := 0; {508#true} is VALID [2020-07-18 06:33:54,779 INFO L280 TraceCheckUtils]: 5: Hoare triple {508#true} ~x~0 := 0; {512#(and (<= main_~x~0 0) (<= 0 main_~x~0))} is VALID [2020-07-18 06:33:54,780 INFO L280 TraceCheckUtils]: 6: Hoare triple {512#(and (<= main_~x~0 0) (<= 0 main_~x~0))} ~y~0 := 0; {513#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} is VALID [2020-07-18 06:33:54,781 INFO L280 TraceCheckUtils]: 7: Hoare triple {513#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647; {513#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} is VALID [2020-07-18 06:33:54,782 INFO L280 TraceCheckUtils]: 8: Hoare triple {513#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} ~n~0 := #t~nondet0; {513#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} is VALID [2020-07-18 06:33:54,783 INFO L280 TraceCheckUtils]: 9: Hoare triple {513#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} havoc #t~nondet0; {513#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} is VALID [2020-07-18 06:33:54,790 INFO L280 TraceCheckUtils]: 10: Hoare triple {513#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} assume !!(~n~0 > 0); {513#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} is VALID [2020-07-18 06:33:54,791 INFO L280 TraceCheckUtils]: 11: Hoare triple {513#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} ~i~0 := 0; {513#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} is VALID [2020-07-18 06:33:54,792 INFO L280 TraceCheckUtils]: 12: Hoare triple {513#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} assume !!(~i~0 < ~n~0); {513#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} is VALID [2020-07-18 06:33:54,793 INFO L280 TraceCheckUtils]: 13: Hoare triple {513#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} ~x~0 := ~x~0 - ~y~0; {512#(and (<= main_~x~0 0) (<= 0 main_~x~0))} is VALID [2020-07-18 06:33:54,795 INFO L263 TraceCheckUtils]: 14: Hoare triple {512#(and (<= main_~x~0 0) (<= 0 main_~x~0))} call __VERIFIER_assert((if 0 == ~x~0 then 1 else 0)); {514#(not (= 0 |__VERIFIER_assert_#in~cond|))} is VALID [2020-07-18 06:33:54,796 INFO L280 TraceCheckUtils]: 15: Hoare triple {514#(not (= 0 |__VERIFIER_assert_#in~cond|))} ~cond := #in~cond; {515#(not (= 0 __VERIFIER_assert_~cond))} is VALID [2020-07-18 06:33:54,797 INFO L280 TraceCheckUtils]: 16: Hoare triple {515#(not (= 0 __VERIFIER_assert_~cond))} assume 0 == ~cond; {509#false} is VALID [2020-07-18 06:33:54,797 INFO L280 TraceCheckUtils]: 17: Hoare triple {509#false} assume !false; {509#false} is VALID [2020-07-18 06:33:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-18 06:33:54,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133670287] [2020-07-18 06:33:54,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-18 06:33:54,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-18 06:33:54,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725913453] [2020-07-18 06:33:54,801 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-07-18 06:33:54,802 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-18 06:33:54,804 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states. [2020-07-18 06:33:54,827 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 18 edges. 18 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 06:33:54,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-18 06:33:54,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-18 06:33:54,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-18 06:33:54,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-18 06:33:54,830 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 6 states. [2020-07-18 06:33:55,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 06:33:55,187 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-07-18 06:33:55,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-18 06:33:55,188 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-07-18 06:33:55,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-18 06:33:55,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-07-18 06:33:55,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 44 transitions. [2020-07-18 06:33:55,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-07-18 06:33:55,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 44 transitions. [2020-07-18 06:33:55,195 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 8 states and 44 transitions. [2020-07-18 06:33:55,270 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 44 edges. 44 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 06:33:55,272 INFO L225 Difference]: With dead ends: 42 [2020-07-18 06:33:55,272 INFO L226 Difference]: Without dead ends: 40 [2020-07-18 06:33:55,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-18 06:33:55,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-18 06:33:55,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-07-18 06:33:55,350 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-18 06:33:55,350 INFO L82 GeneralOperation]: Start isEquivalent. First operand 40 states. Second operand 36 states. [2020-07-18 06:33:55,350 INFO L74 IsIncluded]: Start isIncluded. First operand 40 states. Second operand 36 states. [2020-07-18 06:33:55,351 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 36 states. [2020-07-18 06:33:55,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 06:33:55,354 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-07-18 06:33:55,354 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-07-18 06:33:55,355 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 06:33:55,356 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 06:33:55,356 INFO L74 IsIncluded]: Start isIncluded. First operand 36 states. Second operand 40 states. [2020-07-18 06:33:55,356 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 40 states. [2020-07-18 06:33:55,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 06:33:55,359 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-07-18 06:33:55,359 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-07-18 06:33:55,360 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 06:33:55,360 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 06:33:55,361 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-18 06:33:55,361 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-18 06:33:55,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-18 06:33:55,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-18 06:33:55,363 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 18 [2020-07-18 06:33:55,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-18 06:33:55,364 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-18 06:33:55,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-18 06:33:55,364 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 36 states and 37 transitions. [2020-07-18 06:33:55,413 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 37 edges. 37 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 06:33:55,413 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-18 06:33:55,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-18 06:33:55,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 06:33:55,414 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-18 06:33:55,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-18 06:33:55,415 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 06:33:55,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 06:33:55,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1565658423, now seen corresponding path program 1 times [2020-07-18 06:33:55,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 06:33:55,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121049101] [2020-07-18 06:33:55,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 06:33:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 06:33:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 06:33:55,595 INFO L280 TraceCheckUtils]: 0: Hoare triple {758#true} assume true; {758#true} is VALID [2020-07-18 06:33:55,596 INFO L275 TraceCheckUtils]: 1: Hoare quadruple {758#true} {758#true} #66#return; {758#true} is VALID [2020-07-18 06:33:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-18 06:33:55,605 INFO L280 TraceCheckUtils]: 0: Hoare triple {758#true} ~cond := #in~cond; {758#true} is VALID [2020-07-18 06:33:55,605 INFO L280 TraceCheckUtils]: 1: Hoare triple {758#true} assume !(0 == ~cond); {758#true} is VALID [2020-07-18 06:33:55,606 INFO L280 TraceCheckUtils]: 2: Hoare triple {758#true} assume true; {758#true} is VALID [2020-07-18 06:33:55,607 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {758#true} {762#(and (<= main_~x~0 0) (<= 0 main_~x~0))} #70#return; {762#(and (<= main_~x~0 0) (<= 0 main_~x~0))} is VALID [2020-07-18 06:33:55,607 INFO L263 TraceCheckUtils]: 0: Hoare triple {758#true} call ULTIMATE.init(); {758#true} is VALID [2020-07-18 06:33:55,607 INFO L280 TraceCheckUtils]: 1: Hoare triple {758#true} assume true; {758#true} is VALID [2020-07-18 06:33:55,608 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {758#true} {758#true} #66#return; {758#true} is VALID [2020-07-18 06:33:55,608 INFO L263 TraceCheckUtils]: 3: Hoare triple {758#true} call #t~ret3 := main(); {758#true} is VALID [2020-07-18 06:33:55,608 INFO L280 TraceCheckUtils]: 4: Hoare triple {758#true} ~i~0 := 0; {758#true} is VALID [2020-07-18 06:33:55,609 INFO L280 TraceCheckUtils]: 5: Hoare triple {758#true} ~x~0 := 0; {762#(and (<= main_~x~0 0) (<= 0 main_~x~0))} is VALID [2020-07-18 06:33:55,610 INFO L280 TraceCheckUtils]: 6: Hoare triple {762#(and (<= main_~x~0 0) (<= 0 main_~x~0))} ~y~0 := 0; {763#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} is VALID [2020-07-18 06:33:55,611 INFO L280 TraceCheckUtils]: 7: Hoare triple {763#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} assume -2147483648 <= #t~nondet0 && #t~nondet0 <= 2147483647; {763#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} is VALID [2020-07-18 06:33:55,612 INFO L280 TraceCheckUtils]: 8: Hoare triple {763#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} ~n~0 := #t~nondet0; {763#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} is VALID [2020-07-18 06:33:55,613 INFO L280 TraceCheckUtils]: 9: Hoare triple {763#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} havoc #t~nondet0; {763#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} is VALID [2020-07-18 06:33:55,614 INFO L280 TraceCheckUtils]: 10: Hoare triple {763#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} assume !!(~n~0 > 0); {763#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} is VALID [2020-07-18 06:33:55,614 INFO L280 TraceCheckUtils]: 11: Hoare triple {763#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} ~i~0 := 0; {763#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} is VALID [2020-07-18 06:33:55,615 INFO L280 TraceCheckUtils]: 12: Hoare triple {763#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} assume !!(~i~0 < ~n~0); {763#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} is VALID [2020-07-18 06:33:55,616 INFO L280 TraceCheckUtils]: 13: Hoare triple {763#(and (<= main_~y~0 main_~x~0) (<= main_~x~0 main_~y~0))} ~x~0 := ~x~0 - ~y~0; {762#(and (<= main_~x~0 0) (<= 0 main_~x~0))} is VALID [2020-07-18 06:33:55,617 INFO L263 TraceCheckUtils]: 14: Hoare triple {762#(and (<= main_~x~0 0) (<= 0 main_~x~0))} call __VERIFIER_assert((if 0 == ~x~0 then 1 else 0)); {758#true} is VALID [2020-07-18 06:33:55,617 INFO L280 TraceCheckUtils]: 15: Hoare triple {758#true} ~cond := #in~cond; {758#true} is VALID [2020-07-18 06:33:55,617 INFO L280 TraceCheckUtils]: 16: Hoare triple {758#true} assume !(0 == ~cond); {758#true} is VALID [2020-07-18 06:33:55,618 INFO L280 TraceCheckUtils]: 17: Hoare triple {758#true} assume true; {758#true} is VALID [2020-07-18 06:33:55,619 INFO L275 TraceCheckUtils]: 18: Hoare quadruple {758#true} {762#(and (<= main_~x~0 0) (<= 0 main_~x~0))} #70#return; {762#(and (<= main_~x~0 0) (<= 0 main_~x~0))} is VALID [2020-07-18 06:33:55,622 INFO L280 TraceCheckUtils]: 19: Hoare triple {762#(and (<= main_~x~0 0) (<= 0 main_~x~0))} assume -2147483648 <= #t~nondet2 && #t~nondet2 <= 2147483647; {762#(and (<= main_~x~0 0) (<= 0 main_~x~0))} is VALID [2020-07-18 06:33:55,623 INFO L280 TraceCheckUtils]: 20: Hoare triple {762#(and (<= main_~x~0 0) (<= 0 main_~x~0))} ~y~0 := #t~nondet2; {762#(and (<= main_~x~0 0) (<= 0 main_~x~0))} is VALID [2020-07-18 06:33:55,624 INFO L280 TraceCheckUtils]: 21: Hoare triple {762#(and (<= main_~x~0 0) (<= 0 main_~x~0))} havoc #t~nondet2; {762#(and (<= main_~x~0 0) (<= 0 main_~x~0))} is VALID [2020-07-18 06:33:55,626 INFO L280 TraceCheckUtils]: 22: Hoare triple {762#(and (<= main_~x~0 0) (<= 0 main_~x~0))} assume !!(0 != ~y~0); {768#(and (or (< 0 main_~y~0) (and (<= main_~x~0 0) (<= (+ main_~y~0 1) 0))) (or (<= 0 main_~x~0) (<= main_~y~0 0)))} is VALID [2020-07-18 06:33:55,627 INFO L280 TraceCheckUtils]: 23: Hoare triple {768#(and (or (< 0 main_~y~0) (and (<= main_~x~0 0) (<= (+ main_~y~0 1) 0))) (or (<= 0 main_~x~0) (<= main_~y~0 0)))} ~x~0 := ~x~0 + ~y~0; {769#(or (<= (+ main_~x~0 1) 0) (<= 1 main_~x~0))} is VALID [2020-07-18 06:33:55,628 INFO L263 TraceCheckUtils]: 24: Hoare triple {769#(or (<= (+ main_~x~0 1) 0) (<= 1 main_~x~0))} call __VERIFIER_assert((if 0 != ~x~0 then 1 else 0)); {770#(not (= 0 |__VERIFIER_assert_#in~cond|))} is VALID [2020-07-18 06:33:55,629 INFO L280 TraceCheckUtils]: 25: Hoare triple {770#(not (= 0 |__VERIFIER_assert_#in~cond|))} ~cond := #in~cond; {771#(not (= 0 __VERIFIER_assert_~cond))} is VALID [2020-07-18 06:33:55,629 INFO L280 TraceCheckUtils]: 26: Hoare triple {771#(not (= 0 __VERIFIER_assert_~cond))} assume 0 == ~cond; {759#false} is VALID [2020-07-18 06:33:55,630 INFO L280 TraceCheckUtils]: 27: Hoare triple {759#false} assume !false; {759#false} is VALID [2020-07-18 06:33:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-18 06:33:55,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121049101] [2020-07-18 06:33:55,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-18 06:33:55,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-18 06:33:55,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094215819] [2020-07-18 06:33:55,634 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-07-18 06:33:55,634 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-18 06:33:55,634 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 8 states. [2020-07-18 06:33:55,665 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 28 edges. 28 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 06:33:55,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-18 06:33:55,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-18 06:33:55,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-18 06:33:55,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-18 06:33:55,667 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 8 states. [2020-07-18 06:33:56,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 06:33:56,201 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-18 06:33:56,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-18 06:33:56,201 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-07-18 06:33:56,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-18 06:33:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-07-18 06:33:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 44 transitions. [2020-07-18 06:33:56,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-07-18 06:33:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 44 transitions. [2020-07-18 06:33:56,209 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 9 states and 44 transitions. [2020-07-18 06:33:56,266 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 44 edges. 44 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 06:33:56,268 INFO L225 Difference]: With dead ends: 46 [2020-07-18 06:33:56,268 INFO L226 Difference]: Without dead ends: 42 [2020-07-18 06:33:56,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-18 06:33:56,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-18 06:33:56,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-07-18 06:33:56,341 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-18 06:33:56,342 INFO L82 GeneralOperation]: Start isEquivalent. First operand 42 states. Second operand 38 states. [2020-07-18 06:33:56,342 INFO L74 IsIncluded]: Start isIncluded. First operand 42 states. Second operand 38 states. [2020-07-18 06:33:56,342 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 38 states. [2020-07-18 06:33:56,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 06:33:56,346 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-07-18 06:33:56,346 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-18 06:33:56,346 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 06:33:56,347 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 06:33:56,347 INFO L74 IsIncluded]: Start isIncluded. First operand 38 states. Second operand 42 states. [2020-07-18 06:33:56,347 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 42 states. [2020-07-18 06:33:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-18 06:33:56,350 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-07-18 06:33:56,350 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-18 06:33:56,351 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-18 06:33:56,351 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-18 06:33:56,351 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-18 06:33:56,351 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-18 06:33:56,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-18 06:33:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-07-18 06:33:56,353 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 28 [2020-07-18 06:33:56,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-18 06:33:56,354 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-07-18 06:33:56,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-18 06:33:56,354 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 38 states and 38 transitions. [2020-07-18 06:33:56,416 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 38 edges. 38 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-18 06:33:56,416 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-07-18 06:33:56,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-18 06:33:56,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-18 06:33:56,418 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-18 06:33:56,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-18 06:33:56,418 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-18 06:33:56,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-18 06:33:56,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1612602333, now seen corresponding path program 1 times [2020-07-18 06:33:56,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-18 06:33:56,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904097326] [2020-07-18 06:33:56,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-18 06:33:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-18 06:33:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-18 06:33:56,507 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-18 06:33:56,507 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-18 06:33:56,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-18 06:33:56,530 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2020-07-18 06:33:56,530 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-18 06:33:56,530 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-18 06:33:56,530 WARN L170 areAnnotationChecker]: assume_abort_if_notENTRY has no Hoare annotation [2020-07-18 06:33:56,530 WARN L170 areAnnotationChecker]: mainENTRY has no Hoare annotation [2020-07-18 06:33:56,530 WARN L170 areAnnotationChecker]: __VERIFIER_assertENTRY has no Hoare annotation [2020-07-18 06:33:56,530 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2020-07-18 06:33:56,530 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-18 06:33:56,530 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-18 06:33:56,531 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-18 06:33:56,531 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-18 06:33:56,531 WARN L170 areAnnotationChecker]: L17 has no Hoare annotation [2020-07-18 06:33:56,531 WARN L170 areAnnotationChecker]: L8 has no Hoare annotation [2020-07-18 06:33:56,531 WARN L170 areAnnotationChecker]: L8 has no Hoare annotation [2020-07-18 06:33:56,531 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-18 06:33:56,531 WARN L170 areAnnotationChecker]: L5-1 has no Hoare annotation [2020-07-18 06:33:56,531 WARN L170 areAnnotationChecker]: L5-3 has no Hoare annotation [2020-07-18 06:33:56,531 WARN L170 areAnnotationChecker]: L17-1 has no Hoare annotation [2020-07-18 06:33:56,531 WARN L170 areAnnotationChecker]: L9 has no Hoare annotation [2020-07-18 06:33:56,531 WARN L170 areAnnotationChecker]: L9 has no Hoare annotation [2020-07-18 06:33:56,532 WARN L170 areAnnotationChecker]: L8-2 has no Hoare annotation [2020-07-18 06:33:56,532 WARN L170 areAnnotationChecker]: L18 has no Hoare annotation [2020-07-18 06:33:56,532 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-18 06:33:56,532 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-18 06:33:56,532 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2020-07-18 06:33:56,532 WARN L170 areAnnotationChecker]: L18-1 has no Hoare annotation [2020-07-18 06:33:56,532 WARN L170 areAnnotationChecker]: L23-1 has no Hoare annotation [2020-07-18 06:33:56,532 WARN L170 areAnnotationChecker]: L27-1 has no Hoare annotation [2020-07-18 06:33:56,532 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2020-07-18 06:33:56,532 WARN L170 areAnnotationChecker]: L18-2 has no Hoare annotation [2020-07-18 06:33:56,532 WARN L170 areAnnotationChecker]: L24 has no Hoare annotation [2020-07-18 06:33:56,532 WARN L170 areAnnotationChecker]: L20-3 has no Hoare annotation [2020-07-18 06:33:56,532 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2020-07-18 06:33:56,532 WARN L170 areAnnotationChecker]: L19 has no Hoare annotation [2020-07-18 06:33:56,533 WARN L170 areAnnotationChecker]: L19 has no Hoare annotation [2020-07-18 06:33:56,533 WARN L170 areAnnotationChecker]: L24-1 has no Hoare annotation [2020-07-18 06:33:56,533 WARN L170 areAnnotationChecker]: L20-4 has no Hoare annotation [2020-07-18 06:33:56,533 WARN L170 areAnnotationChecker]: L19-1 has no Hoare annotation [2020-07-18 06:33:56,533 WARN L170 areAnnotationChecker]: L20 has no Hoare annotation [2020-07-18 06:33:56,533 WARN L170 areAnnotationChecker]: L25 has no Hoare annotation [2020-07-18 06:33:56,533 WARN L170 areAnnotationChecker]: L25 has no Hoare annotation [2020-07-18 06:33:56,533 WARN L170 areAnnotationChecker]: L20-5 has no Hoare annotation [2020-07-18 06:33:56,533 WARN L170 areAnnotationChecker]: L20-5 has no Hoare annotation [2020-07-18 06:33:56,533 WARN L170 areAnnotationChecker]: L20-5 has no Hoare annotation [2020-07-18 06:33:56,533 WARN L170 areAnnotationChecker]: L25-1 has no Hoare annotation [2020-07-18 06:33:56,533 WARN L170 areAnnotationChecker]: L26 has no Hoare annotation [2020-07-18 06:33:56,533 WARN L170 areAnnotationChecker]: L20-6 has no Hoare annotation [2020-07-18 06:33:56,533 WARN L170 areAnnotationChecker]: L20-6 has no Hoare annotation [2020-07-18 06:33:56,534 WARN L170 areAnnotationChecker]: L22 has no Hoare annotation [2020-07-18 06:33:56,534 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2020-07-18 06:33:56,534 WARN L170 areAnnotationChecker]: L27 has no Hoare annotation [2020-07-18 06:33:56,534 WARN L170 areAnnotationChecker]: L23 has no Hoare annotation [2020-07-18 06:33:56,534 WARN L170 areAnnotationChecker]: L23 has no Hoare annotation [2020-07-18 06:33:56,534 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-18 06:33:56,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.07 06:33:56 BoogieIcfgContainer [2020-07-18 06:33:56,537 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-18 06:33:56,539 INFO L168 Benchmark]: Toolchain (without parser) took 3976.37 ms. Allocated memory was 145.8 MB in the beginning and 245.9 MB in the end (delta: 100.1 MB). Free memory was 103.8 MB in the beginning and 166.6 MB in the end (delta: -62.8 MB). Peak memory consumption was 37.4 MB. Max. memory is 7.1 GB. [2020-07-18 06:33:56,540 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory is still 121.9 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-18 06:33:56,541 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.36 ms. Allocated memory is still 145.8 MB. Free memory was 103.4 MB in the beginning and 93.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-18 06:33:56,542 INFO L168 Benchmark]: Boogie Preprocessor took 141.97 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 93.7 MB in the beginning and 181.5 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-18 06:33:56,542 INFO L168 Benchmark]: RCFGBuilder took 374.67 ms. Allocated memory is still 202.9 MB. Free memory was 181.5 MB in the beginning and 161.5 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-07-18 06:33:56,543 INFO L168 Benchmark]: TraceAbstraction took 3194.37 ms. Allocated memory was 202.9 MB in the beginning and 245.9 MB in the end (delta: 43.0 MB). Free memory was 160.5 MB in the beginning and 166.6 MB in the end (delta: -6.0 MB). Peak memory consumption was 36.9 MB. Max. memory is 7.1 GB. [2020-07-18 06:33:56,547 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory is still 121.9 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 258.36 ms. Allocated memory is still 145.8 MB. Free memory was 103.4 MB in the beginning and 93.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.97 ms. Allocated memory was 145.8 MB in the beginning and 202.9 MB in the end (delta: 57.1 MB). Free memory was 93.7 MB in the beginning and 181.5 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 374.67 ms. Allocated memory is still 202.9 MB. Free memory was 181.5 MB in the beginning and 161.5 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3194.37 ms. Allocated memory was 202.9 MB in the beginning and 245.9 MB in the end (delta: 43.0 MB). Free memory was 160.5 MB in the beginning and 166.6 MB in the end (delta: -6.0 MB). Peak memory consumption was 36.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i=0, x=0, y=0; VAL [i=0, x=0, y=0] [L18] int n=__VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=1, i=0, n=1, x=0, y=0] [L19] COND FALSE !(!(n>0)) VAL [i=0, n=1, x=0, y=0] [L20] i=0 VAL [i=0, n=1, x=0, y=0] [L20] COND TRUE i