/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-scaling/ps2-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:39:18,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:39:18,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:39:18,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 16:39:18,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 16:39:18,104 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 16:39:18,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 16:39:18,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 16:39:18,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 16:39:18,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 16:39:18,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 16:39:18,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 16:39:18,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:39:18,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:39:18,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:39:18,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:39:18,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:39:18,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:39:18,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:39:18,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:39:18,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:39:18,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:39:18,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:39:18,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:39:18,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 16:39:18,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 16:39:18,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 16:39:18,140 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 16:39:18,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 16:39:18,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 16:39:18,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 16:39:18,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 16:39:18,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 16:39:18,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 16:39:18,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 16:39:18,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 16:39:18,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 16:39:18,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 16:39:18,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:39:18,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:39:18,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:39:18,149 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 16:39:18,177 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:39:18,178 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:39:18,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:39:18,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:39:18,180 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:39:18,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:39:18,180 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:39:18,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:39:18,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:39:18,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:39:18,181 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:39:18,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:39:18,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:39:18,182 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:39:18,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:39:18,182 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:39:18,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:39:18,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:39:18,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:39:18,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:39:18,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:39:18,183 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:39:18,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:39:18,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:39:18,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:39:18,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:39:18,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:39:18,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:39:18,184 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:39:18,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:39:18,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:39:18,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:39:18,478 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:39:18,478 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:39:18,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound50.c [2021-05-02 16:39:18,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb080dd5/917a99dfb6cd4707aebc3b571d6a9ba9/FLAG9c15966b0 [2021-05-02 16:39:18,881 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:39:18,882 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound50.c [2021-05-02 16:39:18,886 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb080dd5/917a99dfb6cd4707aebc3b571d6a9ba9/FLAG9c15966b0 [2021-05-02 16:39:18,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb080dd5/917a99dfb6cd4707aebc3b571d6a9ba9 [2021-05-02 16:39:18,900 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:39:18,901 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:39:18,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:39:18,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:39:18,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:39:18,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:39:18" (1/1) ... [2021-05-02 16:39:18,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6199a4fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:18, skipping insertion in model container [2021-05-02 16:39:18,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:39:18" (1/1) ... [2021-05-02 16:39:18,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:39:18,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:39:19,005 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-scaling/ps2-ll_unwindbound50.c[454,467] [2021-05-02 16:39:19,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:39:19,017 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:39:19,056 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-scaling/ps2-ll_unwindbound50.c[454,467] [2021-05-02 16:39:19,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:39:19,086 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:39:19,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:19 WrapperNode [2021-05-02 16:39:19,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:39:19,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:39:19,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:39:19,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:39:19,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:19" (1/1) ... [2021-05-02 16:39:19,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:19" (1/1) ... [2021-05-02 16:39:19,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:19" (1/1) ... [2021-05-02 16:39:19,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:19" (1/1) ... [2021-05-02 16:39:19,110 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:19" (1/1) ... [2021-05-02 16:39:19,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:19" (1/1) ... [2021-05-02 16:39:19,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:19" (1/1) ... [2021-05-02 16:39:19,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:39:19,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:39:19,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:39:19,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:39:19,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:19" (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 16:39:19,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:39:19,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:39:19,178 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:39:19,178 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:39:19,179 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:39:19,179 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:39:19,179 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:39:19,179 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:39:19,179 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:39:19,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:39:19,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 16:39:19,180 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:39:19,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:39:19,180 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:39:19,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:39:19,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:39:19,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:39:19,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:39:19,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:39:19,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:39:19,409 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:39:19,410 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:39:19,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:39:19 BoogieIcfgContainer [2021-05-02 16:39:19,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:39:19,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:39:19,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:39:19,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:39:19,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:39:18" (1/3) ... [2021-05-02 16:39:19,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41819a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:39:19, skipping insertion in model container [2021-05-02 16:39:19,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:39:19" (2/3) ... [2021-05-02 16:39:19,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41819a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:39:19, skipping insertion in model container [2021-05-02 16:39:19,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:39:19" (3/3) ... [2021-05-02 16:39:19,415 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound50.c [2021-05-02 16:39:19,418 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:39:19,421 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:39:19,431 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:39:19,458 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:39:19,458 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:39:19,458 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:39:19,458 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:39:19,458 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:39:19,458 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:39:19,458 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:39:19,458 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:39:19,472 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:39:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 16:39:19,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:39:19,476 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:39:19,476 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:39:19,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:39:19,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2021-05-02 16:39:19,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:39:19,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139774262] [2021-05-02 16:39:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:39:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:39:19,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:39:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:39:19,700 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 16:39:19,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:39:19,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139774262] [2021-05-02 16:39:19,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139774262] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:39:19,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:39:19,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:39:19,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655815367] [2021-05-02 16:39:19,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:39:19,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:39:19,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:39:19,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:39:19,715 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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 16:39:19,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:39:19,772 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-02 16:39:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:39:19,773 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 16:39:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:39:19,777 INFO L225 Difference]: With dead ends: 39 [2021-05-02 16:39:19,778 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 16:39:19,779 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:39:19,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 16:39:19,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 16:39:19,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:39:19,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 16:39:19,802 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 16:39:19,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:39:19,802 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 16:39:19,802 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 16:39:19,802 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 16:39:19,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 16:39:19,803 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:39:19,803 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:39:19,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:39:19,803 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:39:19,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:39:19,804 INFO L82 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2021-05-02 16:39:19,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:39:19,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125918084] [2021-05-02 16:39:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:39:19,819 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:39:19,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220410921] [2021-05-02 16:39:19,820 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 16:39:19,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:39:19,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 16:39:19,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:39:19,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:19,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:19,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:19,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:20,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:20,025 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 16:39:20,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:39:20,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125918084] [2021-05-02 16:39:20,025 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:39:20,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220410921] [2021-05-02 16:39:20,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220410921] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:39:20,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:39:20,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 16:39:20,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257689364] [2021-05-02 16:39:20,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 16:39:20,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:39:20,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 16:39:20,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:39:20,028 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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 16:39:20,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:39:20,039 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-02 16:39:20,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 16:39:20,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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 12 [2021-05-02 16:39:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:39:20,043 INFO L225 Difference]: With dead ends: 26 [2021-05-02 16:39:20,043 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 16:39:20,043 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:39:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 16:39:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 16:39:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:39:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 16:39:20,050 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-02 16:39:20,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:39:20,051 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 16:39:20,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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 16:39:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 16:39:20,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 16:39:20,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:39:20,057 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:39:20,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:39:20,261 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:39:20,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:39:20,261 INFO L82 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2021-05-02 16:39:20,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:39:20,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884543039] [2021-05-02 16:39:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:39:20,269 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:39:20,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478445938] [2021-05-02 16:39:20,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:39:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:39:20,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 16:39:20,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:39:20,350 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 16:39:20,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:39:20,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884543039] [2021-05-02 16:39:20,351 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:39:20,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478445938] [2021-05-02 16:39:20,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478445938] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:39:20,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:39:20,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 16:39:20,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727847796] [2021-05-02 16:39:20,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:39:20,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:39:20,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:39:20,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:39:20,353 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 16:39:20,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:39:20,375 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-02 16:39:20,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 16:39:20,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 12 [2021-05-02 16:39:20,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:39:20,376 INFO L225 Difference]: With dead ends: 28 [2021-05-02 16:39:20,376 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 16:39:20,377 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:39:20,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 16:39:20,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 16:39:20,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:39:20,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-02 16:39:20,381 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-02 16:39:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:39:20,381 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-02 16:39:20,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 16:39:20,382 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-02 16:39:20,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 16:39:20,382 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:39:20,382 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:39:20,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:39:20,597 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:39:20,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:39:20,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2021-05-02 16:39:20,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:39:20,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420219731] [2021-05-02 16:39:20,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:39:20,605 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:39:20,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634368383] [2021-05-02 16:39:20,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:39:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:39:20,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 16:39:20,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:39:20,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:20,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:20,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:20,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:20,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:20,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:20,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:20,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:39:20,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:39:20,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420219731] [2021-05-02 16:39:20,713 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:39:20,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634368383] [2021-05-02 16:39:20,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634368383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:39:20,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:39:20,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 16:39:20,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186238709] [2021-05-02 16:39:20,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:39:20,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:39:20,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:39:20,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:39:20,715 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:39:20,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:39:20,737 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-05-02 16:39:20,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 16:39:20,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 16:39:20,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:39:20,738 INFO L225 Difference]: With dead ends: 34 [2021-05-02 16:39:20,738 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 16:39:20,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:39:20,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 16:39:20,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 16:39:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:39:20,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-02 16:39:20,742 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-02 16:39:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:39:20,742 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-02 16:39:20,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:39:20,742 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-02 16:39:20,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 16:39:20,743 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:39:20,743 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:39:20,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:39:20,957 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:39:20,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:39:20,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2021-05-02 16:39:20,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:39:20,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421331609] [2021-05-02 16:39:20,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:39:20,965 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:39:20,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960261556] [2021-05-02 16:39:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:39:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:39:21,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:39:21,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:39:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:39:21,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:39:21,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421331609] [2021-05-02 16:39:21,124 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:39:21,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960261556] [2021-05-02 16:39:21,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960261556] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:39:21,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:39:21,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:39:21,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781084256] [2021-05-02 16:39:21,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:39:21,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:39:21,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:39:21,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:39:21,126 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:39:21,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:39:21,183 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-02 16:39:21,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:39:21,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 16:39:21,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:39:21,191 INFO L225 Difference]: With dead ends: 36 [2021-05-02 16:39:21,191 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 16:39:21,192 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:39:21,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 16:39:21,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 16:39:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:39:21,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-02 16:39:21,207 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-02 16:39:21,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:39:21,207 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-02 16:39:21,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:39:21,207 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-02 16:39:21,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:39:21,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:39:21,208 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:39:21,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:39:21,409 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:39:21,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:39:21,409 INFO L82 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 2 times [2021-05-02 16:39:21,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:39:21,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537438435] [2021-05-02 16:39:21,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:39:21,416 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:39:21,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928112341] [2021-05-02 16:39:21,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:39:21,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:39:21,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:39:21,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 16:39:21,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:39:21,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:21,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:21,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:21,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:21,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:21,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:21,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:21,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:21,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:21,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:21,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:39:21,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:39:21,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537438435] [2021-05-02 16:39:21,532 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:39:21,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928112341] [2021-05-02 16:39:21,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928112341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:39:21,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:39:21,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 16:39:21,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987637111] [2021-05-02 16:39:21,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 16:39:21,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:39:21,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 16:39:21,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:39:21,533 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:39:21,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:39:21,566 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-02 16:39:21,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:39:21,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 16:39:21,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:39:21,567 INFO L225 Difference]: With dead ends: 42 [2021-05-02 16:39:21,567 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 16:39:21,567 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:39:21,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 16:39:21,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 16:39:21,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:39:21,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-02 16:39:21,571 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-02 16:39:21,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:39:21,571 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-02 16:39:21,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:39:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-02 16:39:21,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:39:21,571 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:39:21,571 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:39:21,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 16:39:21,785 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:39:21,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:39:21,785 INFO L82 PathProgramCache]: Analyzing trace with hash -694393736, now seen corresponding path program 2 times [2021-05-02 16:39:21,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:39:21,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162169043] [2021-05-02 16:39:21,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:39:21,792 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:39:21,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304658793] [2021-05-02 16:39:21,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:39:21,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:39:21,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:39:21,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 16:39:21,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:39:21,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:39:21,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:39:21,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162169043] [2021-05-02 16:39:21,964 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:39:21,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304658793] [2021-05-02 16:39:21,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304658793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:39:21,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:39:21,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:39:21,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012370488] [2021-05-02 16:39:21,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:39:21,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:39:21,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:39:21,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:39:21,969 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:39:22,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:39:22,043 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-02 16:39:22,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:39:22,044 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 16:39:22,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:39:22,045 INFO L225 Difference]: With dead ends: 44 [2021-05-02 16:39:22,045 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 16:39:22,046 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:39:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 16:39:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-02 16:39:22,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:39:22,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-02 16:39:22,060 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-02 16:39:22,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:39:22,060 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-02 16:39:22,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:39:22,060 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-02 16:39:22,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 16:39:22,061 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:39:22,061 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:39:22,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:39:22,265 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:39:22,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:39:22,266 INFO L82 PathProgramCache]: Analyzing trace with hash 618442840, now seen corresponding path program 3 times [2021-05-02 16:39:22,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:39:22,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837307110] [2021-05-02 16:39:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:39:22,273 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:39:22,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515339546] [2021-05-02 16:39:22,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:39:22,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 16:39:22,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:39:22,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 16:39:22,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:39:22,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:22,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:39:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 16:39:22,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:39:22,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837307110] [2021-05-02 16:39:22,409 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:39:22,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515339546] [2021-05-02 16:39:22,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515339546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:39:22,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:39:22,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 16:39:22,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606470485] [2021-05-02 16:39:22,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:39:22,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:39:22,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:39:22,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:39:22,412 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 16:39:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:39:22,434 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-05-02 16:39:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 16:39:22,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-05-02 16:39:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:39:22,435 INFO L225 Difference]: With dead ends: 41 [2021-05-02 16:39:22,435 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 16:39:22,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:39:22,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 16:39:22,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 16:39:22,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 16:39:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 16:39:22,436 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-05-02 16:39:22,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:39:22,436 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 16:39:22,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 16:39:22,436 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 16:39:22,437 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 16:39:22,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:39:22,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 16:39:22,783 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-02 16:39:22,783 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-02 16:39:22,783 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-02 16:39:22,783 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 16:39:22,783 INFO L194 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)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 16:39:22,783 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 16:39:22,783 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 16:39:22,784 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2021-05-02 16:39:22,784 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 16:39:22,784 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 16:39:22,784 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 6 8) no Hoare annotation was computed. [2021-05-02 16:39:22,784 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-02 16:39:22,784 INFO L198 CegarLoopUtils]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2021-05-02 16:39:22,784 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-05-02 16:39:22,784 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 18 40) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 16:39:22,784 INFO L194 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (+ (* main_~y~0 main_~y~0) main_~y~0) (* main_~x~0 2))) [2021-05-02 16:39:22,784 INFO L198 CegarLoopUtils]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2021-05-02 16:39:22,784 INFO L198 CegarLoopUtils]: For program point L27-1(lines 27 36) no Hoare annotation was computed. [2021-05-02 16:39:22,784 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 40) no Hoare annotation was computed. [2021-05-02 16:39:22,784 INFO L194 CegarLoopUtils]: At program point L27-3(lines 27 36) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (+ (* main_~y~0 main_~y~0) main_~y~0) (* main_~x~0 2))) [2021-05-02 16:39:22,784 INFO L194 CegarLoopUtils]: At program point L27-4(lines 27 36) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (+ (* main_~y~0 main_~y~0) main_~y~0) (* main_~x~0 2))) [2021-05-02 16:39:22,784 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 40) no Hoare annotation was computed. [2021-05-02 16:39:22,784 INFO L198 CegarLoopUtils]: For program point L37(line 37) no Hoare annotation was computed. [2021-05-02 16:39:22,784 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-05-02 16:39:22,785 INFO L198 CegarLoopUtils]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-05-02 16:39:22,785 INFO L198 CegarLoopUtils]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-05-02 16:39:22,785 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-05-02 16:39:22,785 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-05-02 16:39:22,785 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-05-02 16:39:22,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 04:39:22 BoogieIcfgContainer [2021-05-02 16:39:22,794 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 16:39:22,795 INFO L168 Benchmark]: Toolchain (without parser) took 3893.69 ms. Allocated memory was 185.6 MB in the beginning and 224.4 MB in the end (delta: 38.8 MB). Free memory was 149.4 MB in the beginning and 125.9 MB in the end (delta: 23.5 MB). Peak memory consumption was 63.0 MB. Max. memory is 8.0 GB. [2021-05-02 16:39:22,795 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 185.6 MB. Free memory is still 165.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 16:39:22,795 INFO L168 Benchmark]: CACSL2BoogieTranslator took 184.23 ms. Allocated memory is still 185.6 MB. Free memory was 149.2 MB in the beginning and 168.9 MB in the end (delta: -19.7 MB). Peak memory consumption was 13.5 MB. Max. memory is 8.0 GB. [2021-05-02 16:39:22,795 INFO L168 Benchmark]: Boogie Preprocessor took 30.53 ms. Allocated memory is still 185.6 MB. Free memory was 168.9 MB in the beginning and 167.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 16:39:22,795 INFO L168 Benchmark]: RCFGBuilder took 291.11 ms. Allocated memory is still 185.6 MB. Free memory was 167.2 MB in the beginning and 153.6 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 16:39:22,795 INFO L168 Benchmark]: TraceAbstraction took 3382.81 ms. Allocated memory was 185.6 MB in the beginning and 224.4 MB in the end (delta: 38.8 MB). Free memory was 153.0 MB in the beginning and 125.9 MB in the end (delta: 27.1 MB). Peak memory consumption was 66.3 MB. Max. memory is 8.0 GB. [2021-05-02 16:39:22,796 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 185.6 MB. Free memory is still 165.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 184.23 ms. Allocated memory is still 185.6 MB. Free memory was 149.2 MB in the beginning and 168.9 MB in the end (delta: -19.7 MB). Peak memory consumption was 13.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.53 ms. Allocated memory is still 185.6 MB. Free memory was 168.9 MB in the beginning and 167.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 291.11 ms. Allocated memory is still 185.6 MB. Free memory was 167.2 MB in the beginning and 153.6 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3382.81 ms. Allocated memory was 185.6 MB in the beginning and 224.4 MB in the end (delta: 38.8 MB). Free memory was 153.0 MB in the beginning and 125.9 MB in the end (delta: 27.1 MB). Peak memory consumption was 66.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3193.0ms, OverallIterations: 8, TraceHistogramMax: 4, EmptinessCheckTime: 15.2ms, AutomataDifference: 343.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 133.3ms, InitialAbstractionConstructionTime: 10.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 142 SDtfs, 54 SDslu, 367 SDs, 0 SdLazy, 195 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 132.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 162 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 227.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=7, InterpolantAutomatonStates: 48, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 61.1ms AutomataMinimizationTime, 8 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 20 PreInvPairs, 32 NumberOfFragments, 89 HoareAnnotationTreeSize, 20 FomulaSimplifications, 121 FormulaSimplificationTreeSizeReduction, 61.1ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 199 FormulaSimplificationTreeSizeReductionInter, 66.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 82.6ms SsaConstructionTime, 157.1ms SatisfiabilityAnalysisTime, 713.5ms InterpolantComputationTime, 167 NumberOfCodeBlocks, 151 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 159 ConstructedInterpolants, 0 QuantifiedInterpolants, 486 SizeOfPredicates, 13 NumberOfNonLiveVariables, 882 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 46/79 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || y * y + y == x * 2 RESULT: Ultimate proved your program to be correct! Received shutdown request...