/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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/bitvector/soft_float_4-3a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 17:56:23,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 17:56:23,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 17:56:23,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 17:56:23,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 17:56:23,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 17:56:23,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 17:56:23,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 17:56:23,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 17:56:23,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 17:56:23,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 17:56:23,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 17:56:23,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 17:56:23,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 17:56:23,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 17:56:23,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 17:56:23,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 17:56:23,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 17:56:23,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 17:56:24,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 17:56:24,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 17:56:24,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 17:56:24,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 17:56:24,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 17:56:24,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 17:56:24,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 17:56:24,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 17:56:24,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 17:56:24,038 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 [2020-10-23 17:56:24,093 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 17:56:24,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 17:56:24,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 17:56:24,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 17:56:24,099 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 17:56:24,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 17:56:24,100 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 17:56:24,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 17:56:24,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 17:56:24,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 17:56:24,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 17:56:24,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 17:56:24,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 17:56:24,102 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 17:56:24,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 17:56:24,103 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 17:56:24,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 17:56:24,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 17:56:24,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 17:56:24,104 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 17:56:24,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 17:56:24,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:56:24,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 17:56:24,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 17:56:24,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 17:56:24,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 17:56:24,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 17:56:24,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 17:56:24,106 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 17:56:24,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 17:56:24,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 17:56:24,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 17:56:24,578 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 17:56:24,580 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 17:56:24,580 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 17:56:24,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-10-23 17:56:24,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f75bf561/66adbaa6569a4fbe994fdb9bac7ba31a/FLAG2b86bf937 [2020-10-23 17:56:25,338 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 17:56:25,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_4-3a.c.cil.c [2020-10-23 17:56:25,349 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f75bf561/66adbaa6569a4fbe994fdb9bac7ba31a/FLAG2b86bf937 [2020-10-23 17:56:25,674 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f75bf561/66adbaa6569a4fbe994fdb9bac7ba31a [2020-10-23 17:56:25,677 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 17:56:25,683 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 17:56:25,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 17:56:25,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 17:56:25,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 17:56:25,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:56:25" (1/1) ... [2020-10-23 17:56:25,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f5202ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:25, skipping insertion in model container [2020-10-23 17:56:25,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:56:25" (1/1) ... [2020-10-23 17:56:25,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 17:56:25,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 17:56:26,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:56:26,065 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 17:56:26,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:56:26,208 INFO L208 MainTranslator]: Completed translation [2020-10-23 17:56:26,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:26 WrapperNode [2020-10-23 17:56:26,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 17:56:26,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 17:56:26,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 17:56:26,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 17:56:26,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:26" (1/1) ... [2020-10-23 17:56:26,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:26" (1/1) ... [2020-10-23 17:56:26,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:26" (1/1) ... [2020-10-23 17:56:26,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:26" (1/1) ... [2020-10-23 17:56:26,282 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:26" (1/1) ... [2020-10-23 17:56:26,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:26" (1/1) ... [2020-10-23 17:56:26,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:26" (1/1) ... [2020-10-23 17:56:26,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 17:56:26,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 17:56:26,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 17:56:26,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 17:56:26,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:26" (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 [2020-10-23 17:56:26,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 17:56:26,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 17:56:26,388 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 17:56:26,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 17:56:26,389 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-10-23 17:56:26,390 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-10-23 17:56:26,390 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-10-23 17:56:26,390 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 17:56:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 17:56:26,391 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 17:56:26,392 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 17:56:26,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 17:56:26,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 17:56:26,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 17:56:26,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 17:56:26,395 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-10-23 17:56:26,395 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-10-23 17:56:26,395 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-10-23 17:56:26,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 17:56:26,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 17:56:26,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 17:56:26,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 17:56:26,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 17:56:26,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 17:56:26,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 17:56:27,239 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 17:56:27,239 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-23 17:56:27,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:56:27 BoogieIcfgContainer [2020-10-23 17:56:27,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 17:56:27,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 17:56:27,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 17:56:27,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 17:56:27,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:56:25" (1/3) ... [2020-10-23 17:56:27,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd18693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:56:27, skipping insertion in model container [2020-10-23 17:56:27,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:56:26" (2/3) ... [2020-10-23 17:56:27,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dd18693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:56:27, skipping insertion in model container [2020-10-23 17:56:27,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:56:27" (3/3) ... [2020-10-23 17:56:27,252 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_4-3a.c.cil.c [2020-10-23 17:56:27,265 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 17:56:27,271 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 17:56:27,287 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 17:56:27,318 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 17:56:27,318 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 17:56:27,319 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 17:56:27,319 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 17:56:27,319 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 17:56:27,319 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 17:56:27,319 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 17:56:27,320 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 17:56:27,341 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-10-23 17:56:27,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-23 17:56:27,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:27,351 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 17:56:27,352 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:27,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:27,360 INFO L82 PathProgramCache]: Analyzing trace with hash 946069334, now seen corresponding path program 1 times [2020-10-23 17:56:27,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:27,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434409694] [2020-10-23 17:56:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:27,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:27,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:27,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:28,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 17:56:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 17:56:28,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434409694] [2020-10-23 17:56:28,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838676292] [2020-10-23 17:56:28,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -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 [2020-10-23 17:56:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:28,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-23 17:56:28,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:28,492 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 17:56:28,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 17:56:28,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 13 [2020-10-23 17:56:28,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397739089] [2020-10-23 17:56:28,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 17:56:28,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:28,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 17:56:28,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-23 17:56:28,521 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 8 states. [2020-10-23 17:56:28,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:28,765 INFO L93 Difference]: Finished difference Result 137 states and 203 transitions. [2020-10-23 17:56:28,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 17:56:28,768 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-23 17:56:28,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:28,783 INFO L225 Difference]: With dead ends: 137 [2020-10-23 17:56:28,783 INFO L226 Difference]: Without dead ends: 73 [2020-10-23 17:56:28,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-23 17:56:28,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-23 17:56:28,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2020-10-23 17:56:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-23 17:56:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2020-10-23 17:56:28,854 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 36 [2020-10-23 17:56:28,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:28,855 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2020-10-23 17:56:28,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 17:56:28,855 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2020-10-23 17:56:28,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-23 17:56:28,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:28,862 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-23 17:56:29,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-10-23 17:56:29,077 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:29,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:29,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1142375291, now seen corresponding path program 1 times [2020-10-23 17:56:29,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:29,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920402173] [2020-10-23 17:56:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 17:56:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 17:56:29,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920402173] [2020-10-23 17:56:29,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230065796] [2020-10-23 17:56:29,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -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 [2020-10-23 17:56:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:29,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-23 17:56:29,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 17:56:29,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:29,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2020-10-23 17:56:29,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281071891] [2020-10-23 17:56:29,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 17:56:29,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:29,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 17:56:29,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-23 17:56:29,601 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand 10 states. [2020-10-23 17:56:30,400 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-23 17:56:31,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:31,169 INFO L93 Difference]: Finished difference Result 133 states and 177 transitions. [2020-10-23 17:56:31,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 17:56:31,170 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-23 17:56:31,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:31,173 INFO L225 Difference]: With dead ends: 133 [2020-10-23 17:56:31,173 INFO L226 Difference]: Without dead ends: 104 [2020-10-23 17:56:31,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-23 17:56:31,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-23 17:56:31,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2020-10-23 17:56:31,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-23 17:56:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 116 transitions. [2020-10-23 17:56:31,202 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 116 transitions. Word has length 40 [2020-10-23 17:56:31,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:31,203 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 116 transitions. [2020-10-23 17:56:31,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 17:56:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 116 transitions. [2020-10-23 17:56:31,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-23 17:56:31,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:31,209 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-23 17:56:31,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:31,424 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:31,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:31,425 INFO L82 PathProgramCache]: Analyzing trace with hash 632632071, now seen corresponding path program 1 times [2020-10-23 17:56:31,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:31,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042767428] [2020-10-23 17:56:31,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:31,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:31,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:31,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:31,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 17:56:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 17:56:31,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042767428] [2020-10-23 17:56:31,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573548449] [2020-10-23 17:56:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -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 [2020-10-23 17:56:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:31,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-23 17:56:31,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 17:56:31,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:31,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2020-10-23 17:56:31,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283768035] [2020-10-23 17:56:31,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 17:56:31,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:31,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 17:56:31,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-23 17:56:31,846 INFO L87 Difference]: Start difference. First operand 86 states and 116 transitions. Second operand 10 states. [2020-10-23 17:56:33,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:33,148 INFO L93 Difference]: Finished difference Result 139 states and 183 transitions. [2020-10-23 17:56:33,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 17:56:33,149 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-23 17:56:33,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:33,151 INFO L225 Difference]: With dead ends: 139 [2020-10-23 17:56:33,152 INFO L226 Difference]: Without dead ends: 98 [2020-10-23 17:56:33,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-23 17:56:33,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-23 17:56:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 76. [2020-10-23 17:56:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-23 17:56:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 99 transitions. [2020-10-23 17:56:33,174 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 99 transitions. Word has length 40 [2020-10-23 17:56:33,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:33,174 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 99 transitions. [2020-10-23 17:56:33,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 17:56:33,175 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 99 transitions. [2020-10-23 17:56:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-23 17:56:33,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:33,177 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-23 17:56:33,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:33,392 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:33,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:33,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1415950796, now seen corresponding path program 1 times [2020-10-23 17:56:33,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:33,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409120104] [2020-10-23 17:56:33,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:33,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 17:56:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 17:56:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 17:56:33,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409120104] [2020-10-23 17:56:33,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:56:33,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 17:56:33,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587364682] [2020-10-23 17:56:33,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 17:56:33,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:33,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 17:56:33,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-23 17:56:33,587 INFO L87 Difference]: Start difference. First operand 76 states and 99 transitions. Second operand 10 states. [2020-10-23 17:56:34,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:34,575 INFO L93 Difference]: Finished difference Result 126 states and 167 transitions. [2020-10-23 17:56:34,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 17:56:34,575 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-23 17:56:34,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:34,578 INFO L225 Difference]: With dead ends: 126 [2020-10-23 17:56:34,578 INFO L226 Difference]: Without dead ends: 102 [2020-10-23 17:56:34,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-23 17:56:34,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-23 17:56:34,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-10-23 17:56:34,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-23 17:56:34,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2020-10-23 17:56:34,600 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 125 transitions. Word has length 44 [2020-10-23 17:56:34,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:34,601 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 125 transitions. [2020-10-23 17:56:34,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 17:56:34,601 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 125 transitions. [2020-10-23 17:56:34,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-23 17:56:34,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:34,604 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-23 17:56:34,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 17:56:34,604 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:34,605 INFO L82 PathProgramCache]: Analyzing trace with hash 359056566, now seen corresponding path program 1 times [2020-10-23 17:56:34,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:34,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612224441] [2020-10-23 17:56:34,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:34,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:34,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:34,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:34,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-23 17:56:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:34,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-23 17:56:34,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 17:56:34,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612224441] [2020-10-23 17:56:34,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004904472] [2020-10-23 17:56:34,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -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 [2020-10-23 17:56:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:34,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-23 17:56:34,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-23 17:56:35,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-23 17:56:35,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 14 [2020-10-23 17:56:35,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884282371] [2020-10-23 17:56:35,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 17:56:35,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:35,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 17:56:35,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-23 17:56:35,172 INFO L87 Difference]: Start difference. First operand 94 states and 125 transitions. Second operand 9 states. [2020-10-23 17:56:35,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:35,377 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2020-10-23 17:56:35,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 17:56:35,378 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-23 17:56:35,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:35,380 INFO L225 Difference]: With dead ends: 120 [2020-10-23 17:56:35,380 INFO L226 Difference]: Without dead ends: 96 [2020-10-23 17:56:35,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-23 17:56:35,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-23 17:56:35,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2020-10-23 17:56:35,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-23 17:56:35,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 108 transitions. [2020-10-23 17:56:35,401 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 108 transitions. Word has length 44 [2020-10-23 17:56:35,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:35,403 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 108 transitions. [2020-10-23 17:56:35,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 17:56:35,403 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 108 transitions. [2020-10-23 17:56:35,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-23 17:56:35,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:35,411 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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] [2020-10-23 17:56:35,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:35,626 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:35,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:35,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1058425354, now seen corresponding path program 2 times [2020-10-23 17:56:35,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:35,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739103653] [2020-10-23 17:56:35,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:35,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:35,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:35,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:35,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-23 17:56:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-23 17:56:35,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739103653] [2020-10-23 17:56:35,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3165174] [2020-10-23 17:56:35,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 17:56:36,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 17:56:36,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 17:56:36,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-23 17:56:36,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 17:56:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-23 17:56:36,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 17:56:36,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2020-10-23 17:56:36,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748428507] [2020-10-23 17:56:36,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 17:56:36,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:36,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 17:56:36,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-23 17:56:36,067 INFO L87 Difference]: Start difference. First operand 84 states and 108 transitions. Second operand 9 states. [2020-10-23 17:56:37,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:37,121 INFO L93 Difference]: Finished difference Result 152 states and 204 transitions. [2020-10-23 17:56:37,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 17:56:37,122 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-23 17:56:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:37,126 INFO L225 Difference]: With dead ends: 152 [2020-10-23 17:56:37,127 INFO L226 Difference]: Without dead ends: 123 [2020-10-23 17:56:37,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-23 17:56:37,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-23 17:56:37,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 106. [2020-10-23 17:56:37,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-23 17:56:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 143 transitions. [2020-10-23 17:56:37,181 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 143 transitions. Word has length 44 [2020-10-23 17:56:37,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:37,182 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 143 transitions. [2020-10-23 17:56:37,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 17:56:37,182 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 143 transitions. [2020-10-23 17:56:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-23 17:56:37,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:37,184 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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] [2020-10-23 17:56:37,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-23 17:56:37,390 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:37,391 INFO L82 PathProgramCache]: Analyzing trace with hash 716582008, now seen corresponding path program 2 times [2020-10-23 17:56:37,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:37,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348833112] [2020-10-23 17:56:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:56:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:56:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-23 17:56:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-23 17:56:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:56:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-23 17:56:37,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348833112] [2020-10-23 17:56:37,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:56:37,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-23 17:56:37,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456908387] [2020-10-23 17:56:37,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 17:56:37,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:56:37,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 17:56:37,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-23 17:56:37,880 INFO L87 Difference]: Start difference. First operand 106 states and 143 transitions. Second operand 14 states. [2020-10-23 17:56:39,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:56:39,841 INFO L93 Difference]: Finished difference Result 191 states and 258 transitions. [2020-10-23 17:56:39,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 17:56:39,842 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-23 17:56:39,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:56:39,845 INFO L225 Difference]: With dead ends: 191 [2020-10-23 17:56:39,845 INFO L226 Difference]: Without dead ends: 166 [2020-10-23 17:56:39,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2020-10-23 17:56:39,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-23 17:56:39,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 144. [2020-10-23 17:56:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-23 17:56:39,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 194 transitions. [2020-10-23 17:56:39,876 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 194 transitions. Word has length 44 [2020-10-23 17:56:39,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:56:39,876 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 194 transitions. [2020-10-23 17:56:39,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 17:56:39,876 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 194 transitions. [2020-10-23 17:56:39,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-23 17:56:39,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:56:39,878 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 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] [2020-10-23 17:56:39,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 17:56:39,878 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:56:39,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:56:39,879 INFO L82 PathProgramCache]: Analyzing trace with hash 698333876, now seen corresponding path program 1 times [2020-10-23 17:56:39,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:56:39,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039603276] [2020-10-23 17:56:39,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:56:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 17:56:39,906 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 17:56:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 17:56:39,934 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 17:56:39,963 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 17:56:39,964 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 17:56:39,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 17:56:40,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 05:56:40 BoogieIcfgContainer [2020-10-23 17:56:40,045 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 17:56:40,046 INFO L168 Benchmark]: Toolchain (without parser) took 14367.04 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 126.3 MB in the beginning and 163.7 MB in the end (delta: -37.4 MB). Peak memory consumption was 30.8 MB. Max. memory is 8.0 GB. [2020-10-23 17:56:40,047 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory is still 123.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 17:56:40,048 INFO L168 Benchmark]: CACSL2BoogieTranslator took 526.15 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 113.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 17:56:40,048 INFO L168 Benchmark]: Boogie Preprocessor took 85.78 ms. Allocated memory is still 151.0 MB. Free memory was 113.3 MB in the beginning and 111.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 17:56:40,050 INFO L168 Benchmark]: RCFGBuilder took 941.22 ms. Allocated memory is still 151.0 MB. Free memory was 111.5 MB in the beginning and 120.7 MB in the end (delta: -9.2 MB). Peak memory consumption was 14.6 MB. Max. memory is 8.0 GB. [2020-10-23 17:56:40,055 INFO L168 Benchmark]: TraceAbstraction took 12801.47 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 120.1 MB in the beginning and 163.7 MB in the end (delta: -43.6 MB). Peak memory consumption was 23.5 MB. Max. memory is 8.0 GB. [2020-10-23 17:56:40,061 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory is still 123.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 526.15 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 113.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 85.78 ms. Allocated memory is still 151.0 MB. Free memory was 113.3 MB in the beginning and 111.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 941.22 ms. Allocated memory is still 151.0 MB. Free memory was 111.5 MB in the beginning and 120.7 MB in the end (delta: -9.2 MB). Peak memory consumption was 14.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12801.47 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 120.1 MB in the beginning and 163.7 MB in the end (delta: -43.6 MB). Peak memory consumption was 23.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseOr at line 102, overapproximation of bitwiseAnd at line 100. Possible FailurePath: [L218] unsigned int a ; [L219] unsigned int ma = __VERIFIER_nondet_uint(); [L220] signed char ea = __VERIFIER_nondet_char(); [L221] unsigned int b ; [L222] unsigned int mb = __VERIFIER_nondet_uint(); [L223] signed char eb = __VERIFIER_nondet_char(); [L224] unsigned int r_add1 ; [L225] unsigned int r_add2 ; [L226] unsigned int zero ; [L227] int tmp ; [L228] int tmp___0 ; [L229] int __retres14 ; VAL [ea=127, eb=0, ma=33554432, mb=16777216] [L233] CALL, EXPR base2flt(0, 0) VAL [\old(e)=0, \old(m)=0] [L17] unsigned int res ; [L18] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=0, e=0, m=0] [L21] COND TRUE ! m [L22] __retres4 = 0U VAL [\old(e)=0, \old(m)=0, __retres4=0, e=0, m=0] [L72] return (__retres4); VAL [\old(e)=0, \old(m)=0, \result=0, __retres4=0, e=0, m=0] [L233] RET, EXPR base2flt(0, 0) VAL [base2flt(0, 0)=0, ea=127, eb=0, ma=33554432, mb=16777216] [L233] zero = base2flt(0, 0) [L234] CALL, EXPR base2flt(ma, ea) VAL [\old(e)=127, \old(m)=33554432] [L17] unsigned int res ; [L18] unsigned int __retres4 ; VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L21] COND FALSE !(! m) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L27] COND FALSE !(m < 1U << 24U) VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L49] COND TRUE 1 VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L51] COND TRUE m >= 1U << 25U VAL [\old(e)=127, \old(m)=33554432, e=127, m=33554432] [L56] COND TRUE e >= 127 [L57] __retres4 = 4294967295U VAL [\old(e)=127, \old(m)=33554432, __retres4=4294967295, e=127, m=33554432] [L72] return (__retres4); VAL [\old(e)=127, \old(m)=33554432, \result=4294967295, __retres4=4294967295, e=127, m=33554432] [L234] RET, EXPR base2flt(ma, ea) VAL [base2flt(ma, ea)=4294967295, ea=127, eb=0, ma=33554432, mb=16777216, zero=0] [L234] a = base2flt(ma, ea) [L235] CALL, EXPR base2flt(mb, eb) VAL [\old(e)=0, \old(m)=16777216] [L17] unsigned int res ; [L18] unsigned int __retres4 ; VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L21] COND FALSE !(! m) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L27] COND FALSE !(m < 1U << 24U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L49] COND TRUE 1 VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L51] COND FALSE !(m >= 1U << 25U) VAL [\old(e)=0, \old(m)=16777216, e=0, m=16777216] [L68] m = m & ~ (1U << 24U) [L69] res = m | ((unsigned int )(e + 128) << 24U) [L70] __retres4 = res VAL [\old(e)=0, \old(m)=16777216, __retres4=1, e=0, res=1] [L72] return (__retres4); VAL [\old(e)=0, \old(m)=16777216, \result=4294967297, __retres4=1, e=0, res=1] [L235] RET, EXPR base2flt(mb, eb) VAL [a=4294967295, base2flt(mb, eb)=4294967297, ea=127, eb=0, ma=33554432, mb=16777216, zero=0] [L235] b = base2flt(mb, eb) [L236] CALL addflt(a, b) VAL [\old(a)=4294967295, \old(b)=1] [L76] unsigned int res ; [L77] unsigned int ma ; [L78] unsigned int mb ; [L79] unsigned int delta ; [L80] int ea ; [L81] int eb ; [L82] unsigned int tmp ; [L83] unsigned int __retres10 ; VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1] [L86] COND FALSE !(a < b) VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1] [L93] COND FALSE !(! b) [L100] ma = a & ((1U << 24U) - 1U) [L101] ea = (int )(a >> 24U) - 128 [L102] ma = ma | (1U << 24U) [L103] mb = b & ((1U << 24U) - 1U) [L104] eb = (int )(b >> 24U) - 128 [L105] mb = mb | (1U << 24U) VAL [\old(a)=4294967295, \old(b)=1, a=4294967295, b=1, ea=127, eb=128] [L106] CALL __VERIFIER_assert(ea >= eb) VAL [\old(cond)=0] [L8] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L9] CALL reach_error() [L3] __assert_fail("0", "soft_float_4-3a.c.cil.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 77 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12.6s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 7.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 515 SDtfs, 555 SDslu, 1567 SDs, 0 SdLazy, 3147 SolverSat, 173 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 380 GetRequests, 257 SyntacticMatches, 10 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=144occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 106 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 540 NumberOfCodeBlocks, 540 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 484 ConstructedInterpolants, 0 QuantifiedInterpolants, 51111 SizeOfPredicates, 16 NumberOfNonLiveVariables, 932 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 177/201 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...