/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/loops-crafted-1/sumt3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:45:06,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:45:06,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:45:06,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:45:06,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:45:06,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:45:06,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:45:06,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:45:06,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:45:06,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:45:06,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:45:06,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 18:45:06,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:45:06,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:45:06,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:45:06,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:45:06,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:45:06,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:45:06,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:45:06,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:45:06,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:45:06,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:45:06,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:45:06,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:45:06,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:45:06,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:45:06,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:45:06,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:45:06,388 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 18:45:06,455 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:45:06,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:45:06,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:45:06,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:45:06,459 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:45:06,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:45:06,460 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:45:06,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:45:06,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:45:06,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:45:06,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:45:06,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:45:06,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:45:06,463 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:45:06,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:45:06,463 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:45:06,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:45:06,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:45:06,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:45:06,464 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:45:06,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:45:06,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:45:06,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:45:06,466 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:45:06,466 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:45:06,466 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:45:06,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:45:06,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:45:06,467 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:45:06,467 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:45:06,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:45:07,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:45:07,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:45:07,016 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:45:07,017 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:45:07,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt3.c [2020-10-23 18:45:07,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9c992f96/f3c5cbb488034946bb7ce8d20b647db2/FLAG65e36f5f6 [2020-10-23 18:45:07,772 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:45:07,772 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt3.c [2020-10-23 18:45:07,779 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9c992f96/f3c5cbb488034946bb7ce8d20b647db2/FLAG65e36f5f6 [2020-10-23 18:45:08,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9c992f96/f3c5cbb488034946bb7ce8d20b647db2 [2020-10-23 18:45:08,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:45:08,156 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:45:08,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:45:08,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:45:08,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:45:08,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:45:08" (1/1) ... [2020-10-23 18:45:08,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@744c339a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:08, skipping insertion in model container [2020-10-23 18:45:08,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:45:08" (1/1) ... [2020-10-23 18:45:08,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:45:08,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:45:08,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:45:08,368 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:45:08,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:45:08,406 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:45:08,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:08 WrapperNode [2020-10-23 18:45:08,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:45:08,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:45:08,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:45:08,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:45:08,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:08" (1/1) ... [2020-10-23 18:45:08,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:08" (1/1) ... [2020-10-23 18:45:08,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:08" (1/1) ... [2020-10-23 18:45:08,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:08" (1/1) ... [2020-10-23 18:45:08,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:08" (1/1) ... [2020-10-23 18:45:08,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:08" (1/1) ... [2020-10-23 18:45:08,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:08" (1/1) ... [2020-10-23 18:45:08,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:45:08,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:45:08,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:45:08,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:45:08,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:08" (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 18:45:08,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:45:08,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:45:08,521 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:45:08,521 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 18:45:08,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 18:45:08,522 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:45:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:45:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:45:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:45:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:45:08,523 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 18:45:08,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 18:45:08,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 18:45:08,523 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:45:08,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:45:08,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:45:08,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:45:08,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:45:08,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:45:08,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:45:08,781 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:45:08,782 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 18:45:08,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:45:08 BoogieIcfgContainer [2020-10-23 18:45:08,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:45:08,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:45:08,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:45:08,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:45:08,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:45:08" (1/3) ... [2020-10-23 18:45:08,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef400a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:45:08, skipping insertion in model container [2020-10-23 18:45:08,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:45:08" (2/3) ... [2020-10-23 18:45:08,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef400a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:45:08, skipping insertion in model container [2020-10-23 18:45:08,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:45:08" (3/3) ... [2020-10-23 18:45:08,804 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt3.c [2020-10-23 18:45:08,840 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:45:08,847 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:45:08,862 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:45:08,890 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:45:08,890 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:45:08,890 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:45:08,890 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:45:08,890 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:45:08,891 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:45:08,891 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:45:08,891 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:45:08,909 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-23 18:45:08,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:45:08,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:08,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:08,923 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:08,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:08,937 INFO L82 PathProgramCache]: Analyzing trace with hash 339025689, now seen corresponding path program 1 times [2020-10-23 18:45:08,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:08,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233685761] [2020-10-23 18:45:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:09,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:09,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233685761] [2020-10-23 18:45:09,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:45:09,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 18:45:09,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767284248] [2020-10-23 18:45:09,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 18:45:09,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:09,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 18:45:09,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:45:09,236 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-23 18:45:09,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:09,330 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-10-23 18:45:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 18:45:09,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-23 18:45:09,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:09,340 INFO L225 Difference]: With dead ends: 40 [2020-10-23 18:45:09,340 INFO L226 Difference]: Without dead ends: 17 [2020-10-23 18:45:09,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 18:45:09,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-23 18:45:09,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-23 18:45:09,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-23 18:45:09,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-23 18:45:09,393 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2020-10-23 18:45:09,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:09,393 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-23 18:45:09,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 18:45:09,393 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-23 18:45:09,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-23 18:45:09,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:09,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:09,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:45:09,395 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:09,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:09,396 INFO L82 PathProgramCache]: Analyzing trace with hash -119040727, now seen corresponding path program 1 times [2020-10-23 18:45:09,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:09,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961491460] [2020-10-23 18:45:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:09,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:09,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961491460] [2020-10-23 18:45:09,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:45:09,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:45:09,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496814690] [2020-10-23 18:45:09,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:45:09,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:09,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:45:09,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:45:09,685 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2020-10-23 18:45:09,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:09,909 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-10-23 18:45:09,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:45:09,909 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-23 18:45:09,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:09,912 INFO L225 Difference]: With dead ends: 32 [2020-10-23 18:45:09,912 INFO L226 Difference]: Without dead ends: 19 [2020-10-23 18:45:09,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:45:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-23 18:45:09,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-23 18:45:09,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-23 18:45:09,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-23 18:45:09,922 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-10-23 18:45:09,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:09,923 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-23 18:45:09,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:45:09,923 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-23 18:45:09,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:45:09,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:09,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:09,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:45:09,924 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:09,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:09,925 INFO L82 PathProgramCache]: Analyzing trace with hash -849024154, now seen corresponding path program 1 times [2020-10-23 18:45:09,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:09,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757772575] [2020-10-23 18:45:09,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:10,278 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2020-10-23 18:45:10,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:10,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757772575] [2020-10-23 18:45:10,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001862244] [2020-10-23 18:45:10,473 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 18:45:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:10,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-23 18:45:10,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:10,734 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-10-23 18:45:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:10,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:10,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2020-10-23 18:45:10,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612876768] [2020-10-23 18:45:10,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:45:10,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:10,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:45:10,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:45:10,785 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 14 states. [2020-10-23 18:45:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:11,260 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-23 18:45:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:45:11,261 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2020-10-23 18:45:11,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:11,262 INFO L225 Difference]: With dead ends: 36 [2020-10-23 18:45:11,262 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 18:45:11,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:45:11,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 18:45:11,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-23 18:45:11,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-23 18:45:11,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-23 18:45:11,271 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2020-10-23 18:45:11,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:11,272 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-23 18:45:11,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:45:11,272 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-23 18:45:11,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 18:45:11,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:11,273 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:11,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:45:11,488 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:11,489 INFO L82 PathProgramCache]: Analyzing trace with hash -347448147, now seen corresponding path program 1 times [2020-10-23 18:45:11,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:11,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500118565] [2020-10-23 18:45:11,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:11,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:11,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500118565] [2020-10-23 18:45:11,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355746460] [2020-10-23 18:45:11,952 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 18:45:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:12,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-23 18:45:12,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:12,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:12,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:12,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2020-10-23 18:45:12,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555288513] [2020-10-23 18:45:12,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 18:45:12,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:12,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 18:45:12,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2020-10-23 18:45:12,298 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 20 states. [2020-10-23 18:45:12,772 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-23 18:45:13,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:13,363 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-10-23 18:45:13,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 18:45:13,363 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2020-10-23 18:45:13,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:13,364 INFO L225 Difference]: With dead ends: 40 [2020-10-23 18:45:13,365 INFO L226 Difference]: Without dead ends: 27 [2020-10-23 18:45:13,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2020-10-23 18:45:13,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-23 18:45:13,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-23 18:45:13,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-23 18:45:13,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-23 18:45:13,378 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2020-10-23 18:45:13,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:13,378 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-23 18:45:13,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 18:45:13,378 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-23 18:45:13,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-23 18:45:13,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:13,379 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:13,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:13,594 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:13,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:13,595 INFO L82 PathProgramCache]: Analyzing trace with hash -80381770, now seen corresponding path program 1 times [2020-10-23 18:45:13,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:13,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671507829] [2020-10-23 18:45:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:14,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:14,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:14,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671507829] [2020-10-23 18:45:14,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741884526] [2020-10-23 18:45:14,080 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 18:45:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:14,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-23 18:45:14,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:14,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:14,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2020-10-23 18:45:14,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435045966] [2020-10-23 18:45:14,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 18:45:14,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:14,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 18:45:14,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2020-10-23 18:45:14,687 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 24 states. [2020-10-23 18:45:15,048 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-23 18:45:15,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:15,934 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-10-23 18:45:15,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:45:15,934 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2020-10-23 18:45:15,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:15,935 INFO L225 Difference]: With dead ends: 48 [2020-10-23 18:45:15,935 INFO L226 Difference]: Without dead ends: 34 [2020-10-23 18:45:15,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 18:45:15,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-23 18:45:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-23 18:45:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-23 18:45:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-23 18:45:15,945 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 24 [2020-10-23 18:45:15,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:15,945 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-23 18:45:15,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 18:45:15,946 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-23 18:45:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 18:45:15,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:15,947 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:16,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:16,159 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:16,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:16,163 INFO L82 PathProgramCache]: Analyzing trace with hash 283235798, now seen corresponding path program 2 times [2020-10-23 18:45:16,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:16,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223611898] [2020-10-23 18:45:16,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:16,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:16,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223611898] [2020-10-23 18:45:16,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488652007] [2020-10-23 18:45:16,700 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 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 18:45:16,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:45:16,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:45:16,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-23 18:45:16,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:45:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:45:17,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:45:17,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17] total 25 [2020-10-23 18:45:17,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608278079] [2020-10-23 18:45:17,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-23 18:45:17,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:45:17,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-23 18:45:17,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-10-23 18:45:17,478 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 25 states. [2020-10-23 18:45:17,973 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-23 18:45:18,161 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-23 18:45:18,383 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-23 18:45:18,578 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-23 18:45:18,806 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-23 18:45:18,975 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-23 18:45:19,157 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-23 18:45:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:45:19,536 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-10-23 18:45:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:45:19,537 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 30 [2020-10-23 18:45:19,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:45:19,538 INFO L225 Difference]: With dead ends: 45 [2020-10-23 18:45:19,538 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 18:45:19,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2020-10-23 18:45:19,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 18:45:19,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-23 18:45:19,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-23 18:45:19,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-23 18:45:19,551 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 30 [2020-10-23 18:45:19,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:45:19,552 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-23 18:45:19,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-23 18:45:19,552 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-23 18:45:19,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-23 18:45:19,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:45:19,553 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:45:19,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:45:19,769 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:45:19,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:45:19,770 INFO L82 PathProgramCache]: Analyzing trace with hash 980055746, now seen corresponding path program 3 times [2020-10-23 18:45:19,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:45:19,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354032522] [2020-10-23 18:45:19,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:45:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:20,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:45:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:45:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 18:45:20,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354032522] [2020-10-23 18:45:20,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494101517] [2020-10-23 18:45:20,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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