/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:56:51,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:56:51,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:56:51,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:56:51,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:56:51,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:56:51,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:56:51,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:56:51,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:56:51,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:56:51,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:56:51,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:56:51,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:56:51,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:56:51,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:56:51,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:56:51,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:56:51,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:56:51,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:56:51,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:56:51,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:56:51,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:56:51,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:56:51,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:56:51,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:56:51,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:56:51,183 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:56:51,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:56:51,184 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:56:51,208 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:56:51,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:56:51,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:56:51,209 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:56:51,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:56:51,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:56:51,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:56:51,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:56:51,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:56:51,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:56:51,210 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:56:51,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:56:51,210 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:56:51,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:56:51,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:56:51,210 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:56:51,211 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:56:51,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:56:51,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:56:51,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:56:51,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:56:51,213 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:56:51,213 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:56:51,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:56:51,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:56:51,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:56:51,460 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:56:51,460 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:56:51,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound2.i [2021-05-06 07:56:51,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a35e371e5/b1c82815cdf0416ebff6ef9da7c83009/FLAGf3b75709b [2021-05-06 07:56:51,875 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:56:51,875 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound2.i [2021-05-06 07:56:51,881 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a35e371e5/b1c82815cdf0416ebff6ef9da7c83009/FLAGf3b75709b [2021-05-06 07:56:52,296 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a35e371e5/b1c82815cdf0416ebff6ef9da7c83009 [2021-05-06 07:56:52,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:56:52,302 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:56:52,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:56:52,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:56:52,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:56:52,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:56:52" (1/1) ... [2021-05-06 07:56:52,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a9b7877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:52, skipping insertion in model container [2021-05-06 07:56:52,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:56:52" (1/1) ... [2021-05-06 07:56:52,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:56:52,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:56:52,412 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/divbin_unwindbound2.i[958,971] [2021-05-06 07:56:52,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:56:52,434 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:56:52,478 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/divbin_unwindbound2.i[958,971] [2021-05-06 07:56:52,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:56:52,500 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:56:52,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:52 WrapperNode [2021-05-06 07:56:52,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:56:52,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:56:52,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:56:52,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:56:52,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:52" (1/1) ... [2021-05-06 07:56:52,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:52" (1/1) ... [2021-05-06 07:56:52,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:52" (1/1) ... [2021-05-06 07:56:52,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:52" (1/1) ... [2021-05-06 07:56:52,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:52" (1/1) ... [2021-05-06 07:56:52,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:52" (1/1) ... [2021-05-06 07:56:52,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:52" (1/1) ... [2021-05-06 07:56:52,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:56:52,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:56:52,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:56:52,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:56:52,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:52" (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 [2021-05-06 07:56:52,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:56:52,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:56:52,606 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:56:52,606 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:56:52,607 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:56:52,607 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:56:52,607 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:56:52,607 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:56:52,607 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 07:56:52,607 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 07:56:52,608 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:56:52,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:56:52,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 07:56:52,608 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:56:52,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:56:52,608 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:56:52,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:56:52,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:56:52,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:56:52,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:56:52,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:56:52,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:56:52,805 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:56:52,805 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:56:52,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:56:52 BoogieIcfgContainer [2021-05-06 07:56:52,806 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:56:52,806 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:56:52,806 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:56:52,807 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:56:52,808 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:56:52" (1/1) ... [2021-05-06 07:56:52,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:56:52 BasicIcfg [2021-05-06 07:56:52,818 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:56:52,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:56:52,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:56:52,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:56:52,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:56:52" (1/4) ... [2021-05-06 07:56:52,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52d3c11e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:56:52, skipping insertion in model container [2021-05-06 07:56:52,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:56:52" (2/4) ... [2021-05-06 07:56:52,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52d3c11e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:56:52, skipping insertion in model container [2021-05-06 07:56:52,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:56:52" (3/4) ... [2021-05-06 07:56:52,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52d3c11e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:56:52, skipping insertion in model container [2021-05-06 07:56:52,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:56:52" (4/4) ... [2021-05-06 07:56:52,822 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound2.iJordan [2021-05-06 07:56:52,826 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:56:52,828 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:56:52,849 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:56:52,862 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:56:52,862 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:56:52,868 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:56:52,868 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:56:52,868 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:56:52,868 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:56:52,868 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:56:52,868 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:56:52,886 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:56:52,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:56:52,890 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:56:52,891 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:56:52,891 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:56:52,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:56:52,894 INFO L82 PathProgramCache]: Analyzing trace with hash 35225450, now seen corresponding path program 1 times [2021-05-06 07:56:52,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:56:52,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143046150] [2021-05-06 07:56:52,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:56:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:56:53,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:56:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:56:53,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:56:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:56:53,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 07:56:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:56:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:56:53,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:56:53,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143046150] [2021-05-06 07:56:53,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143046150] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:56:53,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:56:53,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:56:53,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553888365] [2021-05-06 07:56:53,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:56:53,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:56:53,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:56:53,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:56:53,112 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:56:53,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:56:53,189 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-06 07:56:53,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:56:53,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 07:56:53,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:56:53,197 INFO L225 Difference]: With dead ends: 34 [2021-05-06 07:56:53,198 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 07:56:53,199 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:56:53,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 07:56:53,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-06 07:56:53,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:56:53,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-05-06 07:56:53,225 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2021-05-06 07:56:53,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:56:53,225 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-05-06 07:56:53,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:56:53,225 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-05-06 07:56:53,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 07:56:53,226 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:56:53,227 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:56:53,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:56:53,227 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:56:53,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:56:53,228 INFO L82 PathProgramCache]: Analyzing trace with hash 106385839, now seen corresponding path program 1 times [2021-05-06 07:56:53,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:56:53,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566250841] [2021-05-06 07:56:53,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:56:53,257 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:56:53,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317221205] [2021-05-06 07:56:53,257 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 [2021-05-06 07:56:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:56:53,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 07:56:53,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:56:53,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:53,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:53,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:53,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:53,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:56:53,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:56:53,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566250841] [2021-05-06 07:56:53,432 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:56:53,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317221205] [2021-05-06 07:56:53,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317221205] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:56:53,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:56:53,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 07:56:53,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105169537] [2021-05-06 07:56:53,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 07:56:53,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:56:53,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 07:56:53,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:56:53,434 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:56:53,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:56:53,442 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-05-06 07:56:53,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 07:56:53,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-05-06 07:56:53,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:56:53,444 INFO L225 Difference]: With dead ends: 30 [2021-05-06 07:56:53,444 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 07:56:53,444 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:56:53,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 07:56:53,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 07:56:53,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:56:53,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-05-06 07:56:53,447 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2021-05-06 07:56:53,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:56:53,448 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-05-06 07:56:53,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:56:53,448 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-05-06 07:56:53,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 07:56:53,449 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:56:53,449 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:56:53,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:56:53,665 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:56:53,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:56:53,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1662084126, now seen corresponding path program 1 times [2021-05-06 07:56:53,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:56:53,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279136885] [2021-05-06 07:56:53,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:56:53,678 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:56:53,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050959313] [2021-05-06 07:56:53,678 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 [2021-05-06 07:56:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:56:53,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:56:53,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:56:53,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:53,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:53,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:53,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:53,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:53,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:53,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:53,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:56:53,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:56:53,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279136885] [2021-05-06 07:56:53,843 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:56:53,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050959313] [2021-05-06 07:56:53,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050959313] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:56:53,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:56:53,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:56:53,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051423190] [2021-05-06 07:56:53,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:56:53,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:56:53,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:56:53,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:56:53,845 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:56:53,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:56:53,876 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-05-06 07:56:53,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:56:53,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-06 07:56:53,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:56:53,879 INFO L225 Difference]: With dead ends: 34 [2021-05-06 07:56:53,879 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:56:53,880 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:56:53,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:56:53,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-06 07:56:53,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:56:53,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-05-06 07:56:53,883 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2021-05-06 07:56:53,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:56:53,883 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-05-06 07:56:53,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:56:53,883 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-05-06 07:56:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 07:56:53,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:56:53,884 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:56:54,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:56:54,102 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:56:54,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:56:54,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1663216184, now seen corresponding path program 1 times [2021-05-06 07:56:54,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:56:54,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545477765] [2021-05-06 07:56:54,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:56:54,114 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:56:54,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574210703] [2021-05-06 07:56:54,114 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 [2021-05-06 07:56:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:56:54,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:56:54,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:56:54,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:54,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:54,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:54,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:54,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 07:56:54,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:56:54,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545477765] [2021-05-06 07:56:54,320 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:56:54,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574210703] [2021-05-06 07:56:54,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574210703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:56:54,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:56:54,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:56:54,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183542150] [2021-05-06 07:56:54,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:56:54,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:56:54,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:56:54,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:56:54,321 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:56:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:56:56,633 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2021-05-06 07:56:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:56:56,634 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-06 07:56:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:56:56,634 INFO L225 Difference]: With dead ends: 40 [2021-05-06 07:56:56,634 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 07:56:56,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:56:56,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 07:56:56,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-06 07:56:56,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:56:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-05-06 07:56:56,639 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 26 [2021-05-06 07:56:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:56:56,639 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-05-06 07:56:56,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:56:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-05-06 07:56:56,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 07:56:56,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:56:56,640 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:56:56,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:56:56,845 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:56:56,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:56:56,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1664227005, now seen corresponding path program 1 times [2021-05-06 07:56:56,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:56:56,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352522860] [2021-05-06 07:56:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:56:56,854 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:56:56,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418322177] [2021-05-06 07:56:56,854 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 [2021-05-06 07:56:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:56:56,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:56:56,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:56:56,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:56,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:56,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:56,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:56,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:56,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:56,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:56,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:56:56,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:56:56,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352522860] [2021-05-06 07:56:56,998 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:56:56,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418322177] [2021-05-06 07:56:56,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418322177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:56:56,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:56:56,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 07:56:56,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287578191] [2021-05-06 07:56:56,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:56:56,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:56:57,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:56:57,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:56:57,000 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:56:57,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:56:57,029 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-05-06 07:56:57,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:56:57,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 07:56:57,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:56:57,030 INFO L225 Difference]: With dead ends: 41 [2021-05-06 07:56:57,030 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 07:56:57,030 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:56:57,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 07:56:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 07:56:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:56:57,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-05-06 07:56:57,034 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 28 [2021-05-06 07:56:57,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:56:57,034 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-05-06 07:56:57,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:56:57,034 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-05-06 07:56:57,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 07:56:57,034 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:56:57,035 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:56:57,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:56:57,252 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:56:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:56:57,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1687306486, now seen corresponding path program 1 times [2021-05-06 07:56:57,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:56:57,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987020754] [2021-05-06 07:56:57,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:56:57,261 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:56:57,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617283672] [2021-05-06 07:56:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 07:56:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:56:57,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 07:56:57,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:56:57,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:57,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:57,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:57,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:57,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 07:56:57,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:56:57,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987020754] [2021-05-06 07:56:57,502 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:56:57,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617283672] [2021-05-06 07:56:57,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617283672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:56:57,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:56:57,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:56:57,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474182202] [2021-05-06 07:56:57,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:56:57,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:56:57,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:56:57,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:56:57,504 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 07:56:57,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:56:57,734 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2021-05-06 07:56:57,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 07:56:57,735 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-05-06 07:56:57,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:56:57,736 INFO L225 Difference]: With dead ends: 56 [2021-05-06 07:56:57,736 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 07:56:57,736 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-06 07:56:57,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 07:56:57,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-05-06 07:56:57,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 37 states have internal predecessors, (44), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 07:56:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-05-06 07:56:57,740 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 29 [2021-05-06 07:56:57,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:56:57,740 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-05-06 07:56:57,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 07:56:57,740 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-05-06 07:56:57,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 07:56:57,741 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:56:57,741 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:56:57,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 07:56:57,953 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:56:57,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:56:57,953 INFO L82 PathProgramCache]: Analyzing trace with hash -666194977, now seen corresponding path program 1 times [2021-05-06 07:56:57,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:56:57,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389519367] [2021-05-06 07:56:57,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:56:57,962 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:56:57,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854276125] [2021-05-06 07:56:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 07:56:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:56:58,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 07:56:58,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:56:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:56:58,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:56:58,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389519367] [2021-05-06 07:56:58,048 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:56:58,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854276125] [2021-05-06 07:56:58,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854276125] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:56:58,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:56:58,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:56:58,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330316205] [2021-05-06 07:56:58,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:56:58,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:56:58,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:56:58,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:56:58,049 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:56:58,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:56:58,064 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-05-06 07:56:58,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:56:58,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-05-06 07:56:58,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:56:58,068 INFO L225 Difference]: With dead ends: 50 [2021-05-06 07:56:58,068 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 07:56:58,068 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:56:58,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 07:56:58,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-06 07:56:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 07:56:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-05-06 07:56:58,081 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 35 [2021-05-06 07:56:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:56:58,082 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-05-06 07:56:58,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 07:56:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-05-06 07:56:58,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 07:56:58,082 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:56:58,082 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:56:58,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:56:58,289 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:56:58,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:56:58,289 INFO L82 PathProgramCache]: Analyzing trace with hash 402759474, now seen corresponding path program 1 times [2021-05-06 07:56:58,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:56:58,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221476822] [2021-05-06 07:56:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:56:58,297 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:56:58,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780309065] [2021-05-06 07:56:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 07:56:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:56:58,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:56:58,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:56:58,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:58,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:58,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:58,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:58,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:58,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:58,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:58,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:58,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:58,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:58,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:56:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 07:56:58,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:56:58,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221476822] [2021-05-06 07:56:58,427 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:56:58,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780309065] [2021-05-06 07:56:58,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780309065] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:56:58,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:56:58,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 07:56:58,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259042986] [2021-05-06 07:56:58,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:56:58,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:56:58,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:56:58,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:56:58,428 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:56:58,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:56:58,453 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-05-06 07:56:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:56:58,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-05-06 07:56:58,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:56:58,457 INFO L225 Difference]: With dead ends: 23 [2021-05-06 07:56:58,457 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 07:56:58,457 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:56:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 07:56:58,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 07:56:58,457 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) [2021-05-06 07:56:58,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 07:56:58,457 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2021-05-06 07:56:58,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:56:58,458 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 07:56:58,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:56:58,458 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 07:56:58,458 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 07:56:58,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:56:58,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:56:58 BasicIcfg [2021-05-06 07:56:58,664 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:56:58,665 INFO L168 Benchmark]: Toolchain (without parser) took 6362.53 ms. Allocated memory was 205.5 MB in the beginning and 247.5 MB in the end (delta: 41.9 MB). Free memory was 171.0 MB in the beginning and 114.8 MB in the end (delta: 56.3 MB). Peak memory consumption was 98.9 MB. Max. memory is 8.0 GB. [2021-05-06 07:56:58,665 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 205.5 MB. Free memory is still 187.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:56:58,665 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.82 ms. Allocated memory is still 205.5 MB. Free memory was 170.8 MB in the beginning and 188.9 MB in the end (delta: -18.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-05-06 07:56:58,665 INFO L168 Benchmark]: Boogie Preprocessor took 17.95 ms. Allocated memory is still 205.5 MB. Free memory was 188.9 MB in the beginning and 187.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 07:56:58,665 INFO L168 Benchmark]: RCFGBuilder took 285.59 ms. Allocated memory is still 205.5 MB. Free memory was 187.1 MB in the beginning and 171.1 MB in the end (delta: 16.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:56:58,665 INFO L168 Benchmark]: IcfgTransformer took 11.77 ms. Allocated memory is still 205.5 MB. Free memory was 171.1 MB in the beginning and 170.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:56:58,665 INFO L168 Benchmark]: TraceAbstraction took 5845.27 ms. Allocated memory was 205.5 MB in the beginning and 247.5 MB in the end (delta: 41.9 MB). Free memory was 169.5 MB in the beginning and 114.8 MB in the end (delta: 54.7 MB). Peak memory consumption was 96.6 MB. Max. memory is 8.0 GB. [2021-05-06 07:56:58,665 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 205.5 MB. Free memory is still 187.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 195.82 ms. Allocated memory is still 205.5 MB. Free memory was 170.8 MB in the beginning and 188.9 MB in the end (delta: -18.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.95 ms. Allocated memory is still 205.5 MB. Free memory was 188.9 MB in the beginning and 187.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 285.59 ms. Allocated memory is still 205.5 MB. Free memory was 187.1 MB in the beginning and 171.1 MB in the end (delta: 16.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 11.77 ms. Allocated memory is still 205.5 MB. Free memory was 171.1 MB in the beginning and 170.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5845.27 ms. Allocated memory was 205.5 MB in the beginning and 247.5 MB in the end (delta: 41.9 MB). Free memory was 169.5 MB in the beginning and 114.8 MB in the end (delta: 54.7 MB). Peak memory consumption was 96.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: 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 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5802.3ms, OverallIterations: 8, TraceHistogramMax: 2, EmptinessCheckTime: 12.2ms, AutomataDifference: 2769.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 236 SDtfs, 103 SDslu, 516 SDs, 0 SdLazy, 283 SolverSat, 44 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2315.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 221 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 307.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=6, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 44.9ms AutomataMinimizationTime, 8 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 53.9ms SsaConstructionTime, 191.1ms SatisfiabilityAnalysisTime, 882.5ms InterpolantComputationTime, 230 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 222 ConstructedInterpolants, 0 QuantifiedInterpolants, 669 SizeOfPredicates, 14 NumberOfNonLiveVariables, 850 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 40/48 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...