/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/freire2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:43:47,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:43:47,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:43:47,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 13:43:47,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 13:43:47,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 13:43:47,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 13:43:47,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 13:43:47,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 13:43:47,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 13:43:47,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 13:43:47,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 13:43:47,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:43:47,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:43:47,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:43:47,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:43:47,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:43:47,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:43:47,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:43:47,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:43:47,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:43:47,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:43:47,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:43:47,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:43:47,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 13:43:47,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 13:43:47,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 13:43:47,638 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 13:43:47,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 13:43:47,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 13:43:47,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 13:43:47,640 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 13:43:47,641 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 13:43:47,642 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 13:43:47,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 13:43:47,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 13:43:47,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 13:43:47,644 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 13:43:47,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:43:47,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:43:47,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:43:47,656 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 [2021-05-02 13:43:47,692 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:43:47,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:43:47,693 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:43:47,694 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:43:47,694 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:43:47,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:43:47,694 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:43:47,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:43:47,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:43:47,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:43:47,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:43:47,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:43:47,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:43:47,695 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:43:47,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:43:47,695 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:43:47,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:43:47,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:43:47,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:43:47,696 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:43:47,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:43:47,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:43:47,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:43:47,697 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:43:47,697 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:43:47,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:43:47,697 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:43:47,697 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:43:47,697 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:43:47,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:43:48,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:43:48,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:43:48,010 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:43:48,011 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:43:48,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/freire2.c [2021-05-02 13:43:48,072 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f52fb265e/c0181ce176f44429ab3b34cffbe44d4d/FLAG9df0a9349 [2021-05-02 13:43:48,499 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:43:48,500 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/freire2.c [2021-05-02 13:43:48,506 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f52fb265e/c0181ce176f44429ab3b34cffbe44d4d/FLAG9df0a9349 [2021-05-02 13:43:48,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f52fb265e/c0181ce176f44429ab3b34cffbe44d4d [2021-05-02 13:43:48,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:43:48,536 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:43:48,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:43:48,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:43:48,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:43:48,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:43:48" (1/1) ... [2021-05-02 13:43:48,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d1fe38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:48, skipping insertion in model container [2021-05-02 13:43:48,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:43:48" (1/1) ... [2021-05-02 13:43:48,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:43:48,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:43:48,715 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/freire2.c[709,722] [2021-05-02 13:43:48,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:43:48,742 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:43:48,773 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/freire2.c[709,722] [2021-05-02 13:43:48,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:43:48,819 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:43:48,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:48 WrapperNode [2021-05-02 13:43:48,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:43:48,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:43:48,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:43:48,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:43:48,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:48" (1/1) ... [2021-05-02 13:43:48,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:48" (1/1) ... [2021-05-02 13:43:48,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:48" (1/1) ... [2021-05-02 13:43:48,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:48" (1/1) ... [2021-05-02 13:43:48,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:48" (1/1) ... [2021-05-02 13:43:48,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:48" (1/1) ... [2021-05-02 13:43:48,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:48" (1/1) ... [2021-05-02 13:43:48,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:43:48,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:43:48,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:43:48,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:43:48,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:48" (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 [2021-05-02 13:43:48,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:43:48,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:43:48,938 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:43:48,938 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:43:48,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:43:48,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:43:48,938 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:43:48,938 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:43:48,939 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:43:48,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:43:48,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2021-05-02 13:43:48,939 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:43:48,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:43:48,940 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:43:48,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:43:48,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:43:48,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:43:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:43:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:43:48,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:43:49,136 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:43:49,137 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:43:49,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:43:49 BoogieIcfgContainer [2021-05-02 13:43:49,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:43:49,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:43:49,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:43:49,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:43:49,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:43:48" (1/3) ... [2021-05-02 13:43:49,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e7e7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:43:49, skipping insertion in model container [2021-05-02 13:43:49,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:48" (2/3) ... [2021-05-02 13:43:49,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e7e7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:43:49, skipping insertion in model container [2021-05-02 13:43:49,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:43:49" (3/3) ... [2021-05-02 13:43:49,144 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2.c [2021-05-02 13:43:49,149 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:43:49,153 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:43:49,168 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:43:49,186 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:43:49,186 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:43:49,186 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:43:49,186 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:43:49,186 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:43:49,186 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:43:49,186 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:43:49,187 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:43:49,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 13:43:49,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:43:49,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:43:49,203 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:43:49,203 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:43:49,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:43:49,208 INFO L82 PathProgramCache]: Analyzing trace with hash 515438393, now seen corresponding path program 1 times [2021-05-02 13:43:49,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:43:49,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042860788] [2021-05-02 13:43:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:43:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:43:49,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:43:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:43:49,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:43:49,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:43:49,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042860788] [2021-05-02 13:43:49,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042860788] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:43:49,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:43:49,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:43:49,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237032709] [2021-05-02 13:43:49,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:43:49,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:43:49,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:43:49,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:43:49,504 INFO L87 Difference]: Start difference. First operand has 25 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:43:49,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:43:49,625 INFO L93 Difference]: Finished difference Result 44 states and 66 transitions. [2021-05-02 13:43:49,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:43:49,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 13:43:49,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:43:49,633 INFO L225 Difference]: With dead ends: 44 [2021-05-02 13:43:49,633 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 13:43:49,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:43:49,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 13:43:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-02 13:43:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:43:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-05-02 13:43:49,682 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2021-05-02 13:43:49,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:43:49,683 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-05-02 13:43:49,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:43:49,684 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-05-02 13:43:49,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:43:49,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:43:49,686 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:43:49,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:43:49,687 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:43:49,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:43:49,690 INFO L82 PathProgramCache]: Analyzing trace with hash 517106689, now seen corresponding path program 1 times [2021-05-02 13:43:49,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:43:49,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342857567] [2021-05-02 13:43:49,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:43:49,717 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:43:49,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432415586] [2021-05-02 13:43:49,718 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 [2021-05-02 13:43:49,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 13:43:49,790 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 13:43:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 13:43:49,809 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 13:43:49,839 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 13:43:49,840 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 13:43:50,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:43:50,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:43:50 BoogieIcfgContainer [2021-05-02 13:43:50,082 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:43:50,083 INFO L168 Benchmark]: Toolchain (without parser) took 1546.44 ms. Allocated memory is still 211.8 MB. Free memory was 175.8 MB in the beginning and 132.2 MB in the end (delta: 43.6 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. [2021-05-02 13:43:50,083 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 211.8 MB. Free memory is still 193.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:43:50,084 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.38 ms. Allocated memory is still 211.8 MB. Free memory was 175.6 MB in the beginning and 194.6 MB in the end (delta: -18.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 13:43:50,084 INFO L168 Benchmark]: Boogie Preprocessor took 50.40 ms. Allocated memory is still 211.8 MB. Free memory was 194.6 MB in the beginning and 193.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 13:43:50,085 INFO L168 Benchmark]: RCFGBuilder took 266.54 ms. Allocated memory is still 211.8 MB. Free memory was 192.5 MB in the beginning and 177.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 13:43:50,086 INFO L168 Benchmark]: TraceAbstraction took 942.50 ms. Allocated memory is still 211.8 MB. Free memory was 177.3 MB in the beginning and 132.2 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. [2021-05-02 13:43:50,088 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 211.8 MB. Free memory is still 193.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 281.38 ms. Allocated memory is still 211.8 MB. Free memory was 175.6 MB in the beginning and 194.6 MB in the end (delta: -18.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.40 ms. Allocated memory is still 211.8 MB. Free memory was 194.6 MB in the beginning and 193.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 266.54 ms. Allocated memory is still 211.8 MB. Free memory was 192.5 MB in the beginning and 177.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 942.50 ms. Allocated memory is still 211.8 MB. Free memory was 177.3 MB in the beginning and 132.2 MB in the end (delta: 45.1 MB). Peak memory consumption was 45.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 33. Possible FailurePath: [L25] int r; [L26] double a, x, s; [L27] a = __VERIFIER_nondet_double() [L28] x = a [L29] s = 3.25 [L30] r = 1 VAL [a=2, r=1, s=13/4, x=2] [L32] COND TRUE 1 VAL [a=2, r=1, s=13/4, x=2] [L33] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L19] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 881.3ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 8.3ms, AutomataDifference: 151.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 23 SDtfs, 11 SDslu, 3 SDs, 0 SdLazy, 9 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 63.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 32.0ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 31.0ms SsaConstructionTime, 65.3ms SatisfiabilityAnalysisTime, 121.9ms InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 40 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...