/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/while_infinite_loop_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:26:35,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:26:35,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:26:35,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:26:35,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:26:35,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:26:35,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:26:35,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:26:35,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:26:35,522 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:26:35,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:26:35,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-02-21 16:26:35,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:26:35,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:26:35,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:26:35,598 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 [2021-02-21 16:26:35,657 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:26:35,658 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:26:35,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:26:35,663 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:26:35,663 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:26:35,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:26:35,663 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:26:35,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:26:35,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:26:35,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:26:35,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:26:35,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:26:35,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:26:35,666 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:26:35,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:26:35,666 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:26:35,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:26:35,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:26:35,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:26:35,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:26:35,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:26:35,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:26:35,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:26:35,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:26:35,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:26:35,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:26:35,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:26:35,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:26:35,670 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:26:36,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:26:36,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:26:36,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:26:36,111 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:26:36,112 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:26:36,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2021-02-21 16:26:36,206 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/964bc9b99/87362d3680944f6da08aa9b5699ba58d/FLAGb70288b78 [2021-02-21 16:26:36,876 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:26:36,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2021-02-21 16:26:36,884 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/964bc9b99/87362d3680944f6da08aa9b5699ba58d/FLAGb70288b78 [2021-02-21 16:26:37,278 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/964bc9b99/87362d3680944f6da08aa9b5699ba58d [2021-02-21 16:26:37,283 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:26:37,298 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:26:37,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:26:37,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:26:37,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:26:37,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:26:37" (1/1) ... [2021-02-21 16:26:37,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55029f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:26:37, skipping insertion in model container [2021-02-21 16:26:37,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:26:37" (1/1) ... [2021-02-21 16:26:37,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:26:37,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:26:37,481 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c[333,346] [2021-02-21 16:26:37,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:26:37,503 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:26:37,518 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c[333,346] [2021-02-21 16:26:37,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:26:37,538 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:26:37,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:26:37 WrapperNode [2021-02-21 16:26:37,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:26:37,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:26:37,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:26:37,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:26:37,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:26:37" (1/1) ... [2021-02-21 16:26:37,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:26:37" (1/1) ... [2021-02-21 16:26:37,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:26:37" (1/1) ... [2021-02-21 16:26:37,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:26:37" (1/1) ... [2021-02-21 16:26:37,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:26:37" (1/1) ... [2021-02-21 16:26:37,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:26:37" (1/1) ... [2021-02-21 16:26:37,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:26:37" (1/1) ... [2021-02-21 16:26:37,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:26:37,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:26:37,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:26:37,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:26:37,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:26:37" (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 [2021-02-21 16:26:37,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:26:37,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:26:37,690 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:26:37,691 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 16:26:37,691 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2021-02-21 16:26:37,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:26:37,691 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:26:37,691 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:26:37,692 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:26:37,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:26:37,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 16:26:37,692 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2021-02-21 16:26:37,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:26:37,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:26:37,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:26:37,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:26:37,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:26:37,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:26:37,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:26:38,007 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:26:38,007 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-21 16:26:38,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:26:38 BoogieIcfgContainer [2021-02-21 16:26:38,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:26:38,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:26:38,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:26:38,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:26:38,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:26:37" (1/3) ... [2021-02-21 16:26:38,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2055b780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:26:38, skipping insertion in model container [2021-02-21 16:26:38,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:26:37" (2/3) ... [2021-02-21 16:26:38,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2055b780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:26:38, skipping insertion in model container [2021-02-21 16:26:38,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:26:38" (3/3) ... [2021-02-21 16:26:38,020 INFO L111 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2021-02-21 16:26:38,027 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:26:38,033 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:26:38,084 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:26:38,117 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:26:38,118 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:26:38,118 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:26:38,118 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:26:38,118 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:26:38,119 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:26:38,119 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:26:38,119 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:26:38,143 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-02-21 16:26:38,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-02-21 16:26:38,155 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:26:38,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:26:38,157 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:26:38,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:26:38,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1499484955, now seen corresponding path program 1 times [2021-02-21 16:26:38,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:26:38,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796897012] [2021-02-21 16:26:38,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:26:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:26:38,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:26:38,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:26:38,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:26:38,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:26:38,629 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-02-21 16:26:38,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:26:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:26:38,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:26:38,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:26:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:26:38,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796897012] [2021-02-21 16:26:38,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:26:38,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 16:26:38,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060450192] [2021-02-21 16:26:38,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 16:26:38,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:26:38,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 16:26:38,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 16:26:38,724 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2021-02-21 16:26:38,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:26:38,858 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2021-02-21 16:26:38,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 16:26:38,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-02-21 16:26:38,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:26:38,873 INFO L225 Difference]: With dead ends: 37 [2021-02-21 16:26:38,874 INFO L226 Difference]: Without dead ends: 19 [2021-02-21 16:26:38,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 16:26:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-02-21 16:26:38,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2021-02-21 16:26:38,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-02-21 16:26:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-02-21 16:26:38,935 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2021-02-21 16:26:38,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:26:38,935 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-02-21 16:26:38,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 16:26:38,936 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-02-21 16:26:38,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-21 16:26:38,938 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:26:38,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:26:38,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:26:38,939 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:26:38,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:26:38,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1713498874, now seen corresponding path program 1 times [2021-02-21 16:26:38,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:26:38,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341587747] [2021-02-21 16:26:38,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:26:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:26:39,003 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:26:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:26:39,050 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:26:39,094 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 16:26:39,095 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 16:26:39,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:26:39,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:26:39 BoogieIcfgContainer [2021-02-21 16:26:39,127 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:26:39,129 INFO L168 Benchmark]: Toolchain (without parser) took 1842.70 ms. Allocated memory is still 153.1 MB. Free memory was 128.6 MB in the beginning and 105.2 MB in the end (delta: 23.4 MB). Peak memory consumption was 23.9 MB. Max. memory is 8.0 GB. [2021-02-21 16:26:39,129 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 153.1 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:26:39,130 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.65 ms. Allocated memory is still 153.1 MB. Free memory was 127.4 MB in the beginning and 118.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:26:39,131 INFO L168 Benchmark]: Boogie Preprocessor took 37.29 ms. Allocated memory is still 153.1 MB. Free memory was 118.2 MB in the beginning and 116.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:26:39,132 INFO L168 Benchmark]: RCFGBuilder took 430.49 ms. Allocated memory is still 153.1 MB. Free memory was 116.7 MB in the beginning and 104.2 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-21 16:26:39,133 INFO L168 Benchmark]: TraceAbstraction took 1115.47 ms. Allocated memory is still 153.1 MB. Free memory was 103.7 MB in the beginning and 105.2 MB in the end (delta: -1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:26:39,138 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 153.1 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 237.65 ms. Allocated memory is still 153.1 MB. Free memory was 127.4 MB in the beginning and 118.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.29 ms. Allocated memory is still 153.1 MB. Free memory was 118.2 MB in the beginning and 116.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 430.49 ms. Allocated memory is still 153.1 MB. Free memory was 116.7 MB in the beginning and 104.2 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1115.47 ms. Allocated memory is still 153.1 MB. Free memory was 103.7 MB in the beginning and 105.2 MB in the end (delta: -1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int x=0; VAL [\old(x)=53, x=0] [L26] COND TRUE 1 VAL [\old(x)=0, x=0] [L28] CALL eval() VAL [\old(x)=0, x=0] [L16] COND TRUE 1 [L17] x=1 VAL [\old(x)=0, x=1] [L28] RET eval() VAL [\old(x)=0, x=1] [L29] CALL __VERIFIER_assert(x==0) VAL [\old(cond)=0, \old(x)=0, x=1] [L6] COND TRUE !(cond) VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] [L7] reach_error() VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 6 SDslu, 3 SDs, 0 SdLazy, 7 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred 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, 1 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 378 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 incorrect! Received shutdown request...