/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/loop-invariants/mod4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 18:13:27,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:13:27,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:13:27,470 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 18:13:27,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 18:13:27,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 18:13:27,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 18:13:27,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 18:13:27,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 18:13:27,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 18:13:27,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 18:13:27,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 18:13:27,486 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 18:13:27,487 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 18:13:27,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 18:13:27,491 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 18:13:27,492 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 18:13:27,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 18:13:27,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 18:13:27,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 18:13:27,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 18:13:27,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 18:13:27,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 18:13:27,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 18:13:27,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 18:13:27,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 18:13:27,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 18:13:27,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 18:13:27,563 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 [2021-02-19 18:13:27,625 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:13:27,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:13:27,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:13:27,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:13:27,631 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:13:27,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:13:27,631 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:13:27,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:13:27,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:13:27,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:13:27,633 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:13:27,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:13:27,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:13:27,634 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:13:27,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:13:27,635 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:13:27,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:13:27,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:13:27,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:13:27,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:13:27,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:13:27,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:13:27,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:13:27,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:13:27,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:13:27,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:13:27,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:13:27,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 18:13:27,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:13:28,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:13:28,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:13:28,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:13:28,169 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 18:13:28,170 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 18:13:28,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/mod4.c [2021-02-19 18:13:28,274 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11824f8dc/5e9da21f9f604eaf8f324beaeb2665dc/FLAG09f0fd080 [2021-02-19 18:13:29,034 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 18:13:29,035 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/mod4.c [2021-02-19 18:13:29,043 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11824f8dc/5e9da21f9f604eaf8f324beaeb2665dc/FLAG09f0fd080 [2021-02-19 18:13:29,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11824f8dc/5e9da21f9f604eaf8f324beaeb2665dc [2021-02-19 18:13:29,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:13:29,407 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:13:29,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 18:13:29,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 18:13:29,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 18:13:29,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 06:13:29" (1/1) ... [2021-02-19 18:13:29,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@103a7665 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:29, skipping insertion in model container [2021-02-19 18:13:29,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 06:13:29" (1/1) ... [2021-02-19 18:13:29,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 18:13:29,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 18:13:29,601 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/mod4.c[351,364] [2021-02-19 18:13:29,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 18:13:29,632 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 18:13:29,653 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/mod4.c[351,364] [2021-02-19 18:13:29,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 18:13:29,691 INFO L208 MainTranslator]: Completed translation [2021-02-19 18:13:29,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:29 WrapperNode [2021-02-19 18:13:29,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 18:13:29,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:13:29,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:13:29,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:13:29,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:29" (1/1) ... [2021-02-19 18:13:29,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:29" (1/1) ... [2021-02-19 18:13:29,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:29" (1/1) ... [2021-02-19 18:13:29,729 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:29" (1/1) ... [2021-02-19 18:13:29,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:29" (1/1) ... [2021-02-19 18:13:29,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:29" (1/1) ... [2021-02-19 18:13:29,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:29" (1/1) ... [2021-02-19 18:13:29,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:13:29,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:13:29,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:13:29,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:13:29,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:29" (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 [2021-02-19 18:13:29,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 18:13:29,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:13:29,908 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 18:13:29,909 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-19 18:13:29,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 18:13:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 18:13:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 18:13:29,910 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 18:13:29,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 18:13:29,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-19 18:13:29,911 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-19 18:13:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 18:13:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 18:13:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 18:13:29,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:13:29,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 18:13:29,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 18:13:29,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 18:13:30,328 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:13:30,328 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-19 18:13:30,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:13:30 BoogieIcfgContainer [2021-02-19 18:13:30,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:13:30,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:13:30,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:13:30,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:13:30,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 06:13:29" (1/3) ... [2021-02-19 18:13:30,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7318b203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:13:30, skipping insertion in model container [2021-02-19 18:13:30,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:13:29" (2/3) ... [2021-02-19 18:13:30,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7318b203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:13:30, skipping insertion in model container [2021-02-19 18:13:30,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:13:30" (3/3) ... [2021-02-19 18:13:30,342 INFO L111 eAbstractionObserver]: Analyzing ICFG mod4.c [2021-02-19 18:13:30,351 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:13:30,397 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:13:30,460 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-19 18:13:30,497 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:13:30,497 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:13:30,497 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:13:30,497 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:13:30,498 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:13:30,498 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:13:30,498 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:13:30,498 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:13:30,518 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-02-19 18:13:30,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 18:13:30,525 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:13:30,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:13:30,527 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:13:30,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:13:30,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1035305623, now seen corresponding path program 1 times [2021-02-19 18:13:30,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:13:30,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957183993] [2021-02-19 18:13:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:13:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:13:30,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:30,756 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:30,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:30,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:30,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:13:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:13:30,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:30,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:13:30,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957183993] [2021-02-19 18:13:30,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:13:30,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:13:30,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716912270] [2021-02-19 18:13:30,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 18:13:30,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:13:30,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 18:13:30,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:13:30,890 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2021-02-19 18:13:30,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:13:30,967 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-02-19 18:13:30,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 18:13:30,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-02-19 18:13:30,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:13:30,980 INFO L225 Difference]: With dead ends: 32 [2021-02-19 18:13:30,980 INFO L226 Difference]: Without dead ends: 13 [2021-02-19 18:13:30,984 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 [2021-02-19 18:13:31,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-02-19 18:13:31,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-02-19 18:13:31,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-02-19 18:13:31,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-02-19 18:13:31,033 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-02-19 18:13:31,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:13:31,034 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-02-19 18:13:31,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-19 18:13:31,035 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-02-19 18:13:31,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 18:13:31,035 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:13:31,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:13:31,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:13:31,036 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:13:31,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:13:31,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2042096758, now seen corresponding path program 1 times [2021-02-19 18:13:31,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:13:31,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997262860] [2021-02-19 18:13:31,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:13:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:13:31,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,125 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,139 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:13:31,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:13:31,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:13:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:13:31,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:13:31,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997262860] [2021-02-19 18:13:31,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:13:31,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:13:31,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377651242] [2021-02-19 18:13:31,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:13:31,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:13:31,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:13:31,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:13:31,260 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2021-02-19 18:13:31,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:13:31,450 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-02-19 18:13:31,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:13:31,450 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-02-19 18:13:31,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:13:31,452 INFO L225 Difference]: With dead ends: 20 [2021-02-19 18:13:31,452 INFO L226 Difference]: Without dead ends: 15 [2021-02-19 18:13:31,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-19 18:13:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-02-19 18:13:31,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-02-19 18:13:31,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-02-19 18:13:31,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-02-19 18:13:31,462 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-02-19 18:13:31,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:13:31,462 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-02-19 18:13:31,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 18:13:31,463 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-02-19 18:13:31,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 18:13:31,464 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:13:31,464 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:13:31,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:13:31,464 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:13:31,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:13:31,465 INFO L82 PathProgramCache]: Analyzing trace with hash 615626395, now seen corresponding path program 1 times [2021-02-19 18:13:31,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:13:31,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45211266] [2021-02-19 18:13:31,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:13:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:13:31,522 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,544 WARN L141 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size [2021-02-19 18:13:31,550 WARN L147 QuantifierPusher]: treesize reduction 1, result has 96.3 percent of original size 26 [2021-02-19 18:13:31,586 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:13:31,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-19 18:13:31,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:13:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:13:31,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,715 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:13:31,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45211266] [2021-02-19 18:13:31,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729577370] [2021-02-19 18:13:31,718 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 [2021-02-19 18:13:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:13:31,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 18:13:31,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:13:31,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,839 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,845 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,848 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,848 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,854 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,876 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,878 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,879 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,880 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,881 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,887 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,890 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,893 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,895 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,895 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,901 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,916 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:13:31,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-19 18:13:31,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-19 18:13:31,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,921 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-19 18:13:31,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,937 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,942 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,942 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,943 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,945 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-19 18:13:31,949 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,950 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:13:31,968 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,969 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-19 18:13:31,969 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:13:31,985 WARN L141 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-02-19 18:13:31,986 WARN L147 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size 1 [2021-02-19 18:13:31,986 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,987 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,989 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:13:31,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:13:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:13:31,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:13:31,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-02-19 18:13:31,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354488270] [2021-02-19 18:13:31,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 18:13:31,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:13:31,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 18:13:31,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-02-19 18:13:31,993 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2021-02-19 18:13:32,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:13:32,251 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-02-19 18:13:32,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:13:32,252 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2021-02-19 18:13:32,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:13:32,253 INFO L225 Difference]: With dead ends: 18 [2021-02-19 18:13:32,253 INFO L226 Difference]: Without dead ends: 0 [2021-02-19 18:13:32,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:13:32,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-19 18:13:32,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-19 18:13:32,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-19 18:13:32,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-19 18:13:32,255 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-02-19 18:13:32,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:13:32,256 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-19 18:13:32,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-19 18:13:32,256 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-19 18:13:32,256 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-19 18:13:32,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-19 18:13:32,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-19 18:13:32,721 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-19 18:13:32,722 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-19 18:13:32,722 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-19 18:13:32,722 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-19 18:13:32,722 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-19 18:13:32,722 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-19 18:13:32,723 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-19 18:13:32,723 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-19 18:13:32,723 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-19 18:13:32,723 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-19 18:13:32,723 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2021-02-19 18:13:32,723 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2021-02-19 18:13:32,724 INFO L189 CegarLoopUtils]: For program point L16(line 16) no Hoare annotation was computed. [2021-02-19 18:13:32,724 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 11 18) no Hoare annotation was computed. [2021-02-19 18:13:32,724 INFO L189 CegarLoopUtils]: For program point L13-1(lines 13 15) no Hoare annotation was computed. [2021-02-19 18:13:32,724 INFO L185 CegarLoopUtils]: At program point L13-3(lines 13 15) the Hoare annotation is: (or (let ((.cse0 (div main_~x~0 4))) (and (<= main_~x~0 (* 4 .cse0)) (< 0 .cse0))) (= main_~x~0 0)) [2021-02-19 18:13:32,724 INFO L185 CegarLoopUtils]: At program point L13-4(lines 13 15) the Hoare annotation is: (or (let ((.cse0 (div main_~x~0 4))) (and (<= main_~x~0 (* 4 .cse0)) (< 0 .cse0))) (= main_~x~0 0)) [2021-02-19 18:13:32,725 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-02-19 18:13:32,725 INFO L189 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2021-02-19 18:13:32,725 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-02-19 18:13:32,725 INFO L189 CegarLoopUtils]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-02-19 18:13:32,725 INFO L189 CegarLoopUtils]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2021-02-19 18:13:32,725 INFO L189 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-02-19 18:13:32,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 06:13:32 BoogieIcfgContainer [2021-02-19 18:13:32,743 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 18:13:32,745 INFO L168 Benchmark]: Toolchain (without parser) took 3348.56 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 53.9 MB in the end (delta: 72.9 MB). Peak memory consumption was 73.6 MB. Max. memory is 8.0 GB. [2021-02-19 18:13:32,746 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-19 18:13:32,746 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.88 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-19 18:13:32,747 INFO L168 Benchmark]: Boogie Preprocessor took 68.07 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-19 18:13:32,748 INFO L168 Benchmark]: RCFGBuilder took 567.00 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 102.5 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-19 18:13:32,749 INFO L168 Benchmark]: TraceAbstraction took 2410.23 ms. Allocated memory is still 151.0 MB. Free memory was 102.0 MB in the beginning and 53.9 MB in the end (delta: 48.1 MB). Peak memory consumption was 48.4 MB. Max. memory is 8.0 GB. [2021-02-19 18:13:32,752 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 283.88 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 68.07 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 567.00 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 102.5 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2410.23 ms. Allocated memory is still 151.0 MB. Free memory was 102.0 MB in the beginning and 53.9 MB in the end (delta: 48.1 MB). Peak memory consumption was 48.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: (x <= 4 * (x / 4) && 0 < x / 4) || x == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 37 SDtfs, 31 SDslu, 45 SDs, 0 SdLazy, 68 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 15 NumberOfFragments, 69 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 298 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 47 ConstructedInterpolants, 0 QuantifiedInterpolants, 2491 SizeOfPredicates, 1 NumberOfNonLiveVariables, 107 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...