/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/sqrt1-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:54:11,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:54:11,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:54:11,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:54:11,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:54:11,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:54:11,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:54:11,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:54:11,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:54:11,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:54:11,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:54:11,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:54:11,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:54:11,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:54:11,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:54:11,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:54:11,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:54:11,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:54:11,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:54:11,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:54:11,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:54:11,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:54:11,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:54:11,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:54:11,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:54:11,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:54:11,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:54:11,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:54:11,756 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:54:11,769 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:54:11,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:54:11,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:54:11,771 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:54:11,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:54:11,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:54:11,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:54:11,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:54:11,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:54:11,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:54:11,772 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:54:11,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:54:11,772 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:54:11,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:54:11,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:54:11,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:54:11,773 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:54:11,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:54:11,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:54:11,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:54:11,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:54:11,774 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:54:11,774 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:54:11,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:54:11,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:54:11,985 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:54:11,986 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:54:11,986 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:54:11,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound5.c [2021-05-06 10:54:12,028 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e16adb1b/71a78ddb76d94ab2b53ee72e5b7bce67/FLAG8dc13c46f [2021-05-06 10:54:12,343 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:54:12,344 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound5.c [2021-05-06 10:54:12,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e16adb1b/71a78ddb76d94ab2b53ee72e5b7bce67/FLAG8dc13c46f [2021-05-06 10:54:12,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e16adb1b/71a78ddb76d94ab2b53ee72e5b7bce67 [2021-05-06 10:54:12,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:54:12,770 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:54:12,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:54:12,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:54:12,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:54:12,774 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:54:12" (1/1) ... [2021-05-06 10:54:12,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72a7f5bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:12, skipping insertion in model container [2021-05-06 10:54:12,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:54:12" (1/1) ... [2021-05-06 10:54:12,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:54:12,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:54:12,872 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/sqrt1-ll_valuebound5.c[520,533] [2021-05-06 10:54:12,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:54:12,892 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:54:12,904 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/sqrt1-ll_valuebound5.c[520,533] [2021-05-06 10:54:12,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:54:12,926 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:54:12,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:12 WrapperNode [2021-05-06 10:54:12,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:54:12,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:54:12,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:54:12,928 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:54:12,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:12" (1/1) ... [2021-05-06 10:54:12,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:12" (1/1) ... [2021-05-06 10:54:12,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:12" (1/1) ... [2021-05-06 10:54:12,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:12" (1/1) ... [2021-05-06 10:54:12,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:12" (1/1) ... [2021-05-06 10:54:12,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:12" (1/1) ... [2021-05-06 10:54:12,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:12" (1/1) ... [2021-05-06 10:54:12,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:54:12,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:54:12,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:54:12,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:54:12,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:12" (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 10:54:13,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:54:13,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:54:13,036 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:54:13,036 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:54:13,036 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:54:13,036 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:54:13,036 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:54:13,037 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:54:13,037 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:54:13,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:54:13,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 10:54:13,037 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:54:13,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:54:13,037 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:54:13,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:54:13,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:54:13,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:54:13,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:54:13,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:54:13,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:54:13,205 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:54:13,205 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:54:13,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:54:13 BoogieIcfgContainer [2021-05-06 10:54:13,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:54:13,206 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:54:13,206 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:54:13,207 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:54:13,209 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:54:13" (1/1) ... [2021-05-06 10:54:13,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:54:13 BasicIcfg [2021-05-06 10:54:13,233 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:54:13,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:54:13,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:54:13,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:54:13,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:54:12" (1/4) ... [2021-05-06 10:54:13,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb2a65c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:54:13, skipping insertion in model container [2021-05-06 10:54:13,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:54:12" (2/4) ... [2021-05-06 10:54:13,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb2a65c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:54:13, skipping insertion in model container [2021-05-06 10:54:13,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:54:13" (3/4) ... [2021-05-06 10:54:13,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb2a65c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:54:13, skipping insertion in model container [2021-05-06 10:54:13,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:54:13" (4/4) ... [2021-05-06 10:54:13,249 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound5.cJordan [2021-05-06 10:54:13,252 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:54:13,255 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:54:13,277 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:54:13,296 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:54:13,296 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:54:13,297 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:54:13,297 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:54:13,297 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:54:13,297 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:54:13,297 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:54:13,297 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:54:13,309 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:54:13,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:54:13,314 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:13,315 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:13,315 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:13,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:13,320 INFO L82 PathProgramCache]: Analyzing trace with hash -179702132, now seen corresponding path program 1 times [2021-05-06 10:54:13,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:13,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377236529] [2021-05-06 10:54:13,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:13,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:54:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:13,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:54:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:54:13,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:13,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377236529] [2021-05-06 10:54:13,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377236529] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:54:13,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:54:13,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:54:13,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694878518] [2021-05-06 10:54:13,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:54:13,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:13,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:54:13,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:54:13,518 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:54:13,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:13,579 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-05-06 10:54:13,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:54:13,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:54:13,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:13,585 INFO L225 Difference]: With dead ends: 31 [2021-05-06 10:54:13,585 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 10:54:13,586 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:54:13,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 10:54:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 10:54:13,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:54:13,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-06 10:54:13,606 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-06 10:54:13,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:13,606 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-06 10:54:13,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:54:13,606 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-06 10:54:13,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 10:54:13,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:13,607 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:13,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:54:13,607 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:13,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:13,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1985279762, now seen corresponding path program 1 times [2021-05-06 10:54:13,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:13,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246056471] [2021-05-06 10:54:13,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:13,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:54:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:13,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:54:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:54:13,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:13,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246056471] [2021-05-06 10:54:13,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246056471] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:54:13,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:54:13,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 10:54:13,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060777652] [2021-05-06 10:54:13,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:54:13,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:13,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:54:13,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:54:13,708 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:54:13,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:13,943 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 10:54:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:54:13,943 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 10:54:13,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:13,946 INFO L225 Difference]: With dead ends: 38 [2021-05-06 10:54:13,946 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 10:54:13,947 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:54:13,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 10:54:13,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-06 10:54:13,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:54:13,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 10:54:13,959 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2021-05-06 10:54:13,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:13,959 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 10:54:13,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 10:54:13,959 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 10:54:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:54:13,960 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:13,960 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:13,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 10:54:13,960 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:13,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:13,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1146988413, now seen corresponding path program 1 times [2021-05-06 10:54:13,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:13,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528031712] [2021-05-06 10:54:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:13,977 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:13,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848759914] [2021-05-06 10:54:13,977 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 10:54:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:14,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:54:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:14,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:54:14,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:14,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528031712] [2021-05-06 10:54:14,146 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:14,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848759914] [2021-05-06 10:54:14,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848759914] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:54:14,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:54:14,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:54:14,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85698234] [2021-05-06 10:54:14,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:54:14,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:14,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:54:14,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:54:14,147 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:54:14,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:14,189 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-06 10:54:14,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:54:14,190 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 10:54:14,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:14,191 INFO L225 Difference]: With dead ends: 42 [2021-05-06 10:54:14,191 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 10:54:14,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:54:14,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 10:54:14,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-06 10:54:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:54:14,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2021-05-06 10:54:14,201 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22 [2021-05-06 10:54:14,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:14,201 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2021-05-06 10:54:14,201 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 10:54:14,201 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2021-05-06 10:54:14,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 10:54:14,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:14,202 INFO L523 BasicCegarLoop]: trace histogram [3, 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 10:54:14,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 10:54:14,421 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:14,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:14,421 INFO L82 PathProgramCache]: Analyzing trace with hash -88951989, now seen corresponding path program 1 times [2021-05-06 10:54:14,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:14,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143587455] [2021-05-06 10:54:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:14,428 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:14,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840474013] [2021-05-06 10:54:14,429 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 10:54:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:14,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:54:14,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:14,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:14,574 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 10:54:14,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:14,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143587455] [2021-05-06 10:54:14,575 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:14,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840474013] [2021-05-06 10:54:14,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840474013] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:54:14,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:54:14,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:54:14,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673279766] [2021-05-06 10:54:14,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:54:14,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:14,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:54:14,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:54:14,579 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 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 10:54:14,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:14,615 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-05-06 10:54:14,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:54:14,616 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), 2 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 27 [2021-05-06 10:54:14,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:14,618 INFO L225 Difference]: With dead ends: 46 [2021-05-06 10:54:14,618 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 10:54:14,618 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:54:14,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 10:54:14,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 10:54:14,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:54:14,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-05-06 10:54:14,624 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 27 [2021-05-06 10:54:14,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:14,625 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-05-06 10:54:14,625 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), 2 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 10:54:14,625 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-05-06 10:54:14,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:54:14,626 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:14,626 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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 10:54:14,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:14,835 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:14,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:14,835 INFO L82 PathProgramCache]: Analyzing trace with hash 196845204, now seen corresponding path program 1 times [2021-05-06 10:54:14,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:14,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048529516] [2021-05-06 10:54:14,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:14,842 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:14,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310357822] [2021-05-06 10:54:14,842 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 10:54:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:14,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:54:14,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:14,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:54:14,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:14,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048529516] [2021-05-06 10:54:14,985 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:14,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310357822] [2021-05-06 10:54:14,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310357822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:14,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:14,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:54:14,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227608425] [2021-05-06 10:54:14,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:54:14,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:14,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:54:14,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:54:14,987 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 10:54:15,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:15,037 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-05-06 10:54:15,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:54:15,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 10:54:15,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:15,038 INFO L225 Difference]: With dead ends: 55 [2021-05-06 10:54:15,039 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 10:54:15,039 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:54:15,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 10:54:15,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-05-06 10:54:15,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 10:54:15,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-05-06 10:54:15,042 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 34 [2021-05-06 10:54:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:15,042 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-05-06 10:54:15,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 10:54:15,043 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-05-06 10:54:15,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 10:54:15,043 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:15,043 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:15,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:15,260 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:15,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:15,261 INFO L82 PathProgramCache]: Analyzing trace with hash -374953577, now seen corresponding path program 2 times [2021-05-06 10:54:15,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:15,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697917689] [2021-05-06 10:54:15,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:15,267 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:15,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798846406] [2021-05-06 10:54:15,268 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 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 10:54:15,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:54:15,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:15,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:54:15,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:15,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 10:54:15,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:15,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697917689] [2021-05-06 10:54:15,437 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:15,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798846406] [2021-05-06 10:54:15,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798846406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:15,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:15,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:54:15,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843000801] [2021-05-06 10:54:15,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:54:15,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:15,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:54:15,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:54:15,438 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 10:54:15,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:15,498 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-05-06 10:54:15,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:54:15,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-06 10:54:15,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:15,499 INFO L225 Difference]: With dead ends: 59 [2021-05-06 10:54:15,499 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 10:54:15,499 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:54:15,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 10:54:15,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-05-06 10:54:15,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 10:54:15,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-05-06 10:54:15,503 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 39 [2021-05-06 10:54:15,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:15,503 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-05-06 10:54:15,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 10:54:15,503 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-05-06 10:54:15,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 10:54:15,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:15,504 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:15,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:15,721 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:15,721 INFO L82 PathProgramCache]: Analyzing trace with hash -786894479, now seen corresponding path program 3 times [2021-05-06 10:54:15,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:15,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938852622] [2021-05-06 10:54:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:15,728 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:15,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717108041] [2021-05-06 10:54:15,728 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 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 10:54:15,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:54:15,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:15,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:54:15,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:15,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 10:54:15,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:15,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938852622] [2021-05-06 10:54:15,892 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:15,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717108041] [2021-05-06 10:54:15,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717108041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:15,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:15,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:54:15,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632462685] [2021-05-06 10:54:15,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:54:15,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:15,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:54:15,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:54:15,893 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 10:54:15,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:15,940 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2021-05-06 10:54:15,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:54:15,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 10:54:15,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:15,941 INFO L225 Difference]: With dead ends: 63 [2021-05-06 10:54:15,941 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 10:54:15,941 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:54:15,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 10:54:15,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 10:54:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 10:54:15,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-05-06 10:54:15,944 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 44 [2021-05-06 10:54:15,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:15,945 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-05-06 10:54:15,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 10:54:15,945 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-05-06 10:54:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 10:54:15,945 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:15,948 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:16,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 10:54:16,149 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:16,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:16,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1256212910, now seen corresponding path program 4 times [2021-05-06 10:54:16,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:16,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42057561] [2021-05-06 10:54:16,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:16,157 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:16,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878306467] [2021-05-06 10:54:16,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 10:54:16,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:54:16,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:16,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:54:16,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:16,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 10:54:16,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:16,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42057561] [2021-05-06 10:54:16,307 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:16,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878306467] [2021-05-06 10:54:16,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878306467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:16,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:16,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:54:16,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735548998] [2021-05-06 10:54:16,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:54:16,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:16,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:54:16,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:54:16,313 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 10:54:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:16,394 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2021-05-06 10:54:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:54:16,395 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), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-06 10:54:16,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:16,396 INFO L225 Difference]: With dead ends: 72 [2021-05-06 10:54:16,396 INFO L226 Difference]: Without dead ends: 72 [2021-05-06 10:54:16,396 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:54:16,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-06 10:54:16,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-05-06 10:54:16,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.075) internal successors, (43), 42 states have internal predecessors, (43), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 10:54:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-05-06 10:54:16,405 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 51 [2021-05-06 10:54:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:16,405 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-05-06 10:54:16,405 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), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 10:54:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-05-06 10:54:16,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 10:54:16,406 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:16,406 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:16,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:16,609 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:16,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:16,609 INFO L82 PathProgramCache]: Analyzing trace with hash 2048057021, now seen corresponding path program 5 times [2021-05-06 10:54:16,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:16,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212142730] [2021-05-06 10:54:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:16,615 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:16,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873374477] [2021-05-06 10:54:16,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 10:54:16,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 10:54:16,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:16,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 10:54:16,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:16,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 10:54:16,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:16,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212142730] [2021-05-06 10:54:16,789 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:16,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873374477] [2021-05-06 10:54:16,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873374477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:16,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:16,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:54:16,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512196569] [2021-05-06 10:54:16,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:54:16,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:16,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:54:16,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:54:16,790 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 10:54:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:16,858 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2021-05-06 10:54:16,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:54:16,859 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), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-06 10:54:16,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:16,861 INFO L225 Difference]: With dead ends: 76 [2021-05-06 10:54:16,861 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 10:54:16,861 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:54:16,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 10:54:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-06 10:54:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 43 states have (on average 1.069767441860465) internal successors, (46), 45 states have internal predecessors, (46), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 10:54:16,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2021-05-06 10:54:16,870 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 56 [2021-05-06 10:54:16,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:16,870 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2021-05-06 10:54:16,870 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), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 10:54:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2021-05-06 10:54:16,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 10:54:16,873 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:16,873 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:17,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:17,084 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:17,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:17,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1440613387, now seen corresponding path program 6 times [2021-05-06 10:54:17,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:17,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345563269] [2021-05-06 10:54:17,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:17,091 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:17,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318224568] [2021-05-06 10:54:17,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:17,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 10:54:17,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:54:17,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 10:54:17,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:17,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 10:54:17,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:17,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345563269] [2021-05-06 10:54:17,294 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:17,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318224568] [2021-05-06 10:54:17,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318224568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:17,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:17,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:54:17,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485079836] [2021-05-06 10:54:17,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:54:17,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:17,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:54:17,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:54:17,296 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 10:54:17,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:17,450 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-05-06 10:54:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:54:17,451 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 10:54:17,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:17,454 INFO L225 Difference]: With dead ends: 84 [2021-05-06 10:54:17,454 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 10:54:17,454 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:54:17,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 10:54:17,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 10:54:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 47 states have internal predecessors, (48), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 10:54:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-05-06 10:54:17,466 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 61 [2021-05-06 10:54:17,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:17,467 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-05-06 10:54:17,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 10:54:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-05-06 10:54:17,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 10:54:17,471 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:54:17,471 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:54:17,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:54:17,681 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:54:17,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:54:17,681 INFO L82 PathProgramCache]: Analyzing trace with hash 555218388, now seen corresponding path program 7 times [2021-05-06 10:54:17,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:54:17,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079612865] [2021-05-06 10:54:17,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:54:17,687 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:54:17,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751036939] [2021-05-06 10:54:17,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:54:17,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:54:17,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:54:17,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:54:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 10:54:17,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:54:17,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079612865] [2021-05-06 10:54:17,934 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:54:17,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751036939] [2021-05-06 10:54:17,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751036939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:54:17,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:54:17,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:54:17,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675167717] [2021-05-06 10:54:17,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:54:17,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:54:17,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:54:17,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:54:17,936 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 10:54:17,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:54:17,975 INFO L93 Difference]: Finished difference Result 63 states and 62 transitions. [2021-05-06 10:54:17,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:54:17,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2021-05-06 10:54:17,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:54:17,975 INFO L225 Difference]: With dead ends: 63 [2021-05-06 10:54:17,975 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 10:54:17,976 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:54:17,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 10:54:17,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 10:54:17,976 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 10:54:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 10:54:17,976 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2021-05-06 10:54:17,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:54:17,976 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 10:54:17,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 10:54:17,976 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 10:54:17,976 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 10:54:18,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:54:18,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:54:18 BasicIcfg [2021-05-06 10:54:18,196 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 10:54:18,197 INFO L168 Benchmark]: Toolchain (without parser) took 5427.15 ms. Allocated memory was 192.9 MB in the beginning and 241.2 MB in the end (delta: 48.2 MB). Free memory was 158.2 MB in the beginning and 133.4 MB in the end (delta: 24.9 MB). Peak memory consumption was 74.2 MB. Max. memory is 8.0 GB. [2021-05-06 10:54:18,197 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 192.9 MB. Free memory is still 174.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 10:54:18,197 INFO L168 Benchmark]: CACSL2BoogieTranslator took 156.57 ms. Allocated memory is still 192.9 MB. Free memory was 158.1 MB in the beginning and 148.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 10:54:18,197 INFO L168 Benchmark]: Boogie Preprocessor took 47.12 ms. Allocated memory is still 192.9 MB. Free memory was 148.3 MB in the beginning and 176.8 MB in the end (delta: -28.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. [2021-05-06 10:54:18,197 INFO L168 Benchmark]: RCFGBuilder took 230.33 ms. Allocated memory is still 192.9 MB. Free memory was 176.8 MB in the beginning and 161.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 10:54:18,197 INFO L168 Benchmark]: IcfgTransformer took 26.32 ms. Allocated memory is still 192.9 MB. Free memory was 161.6 MB in the beginning and 160.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 10:54:18,197 INFO L168 Benchmark]: TraceAbstraction took 4962.47 ms. Allocated memory was 192.9 MB in the beginning and 241.2 MB in the end (delta: 48.2 MB). Free memory was 160.0 MB in the beginning and 133.4 MB in the end (delta: 26.7 MB). Peak memory consumption was 75.9 MB. Max. memory is 8.0 GB. [2021-05-06 10:54:18,197 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 192.9 MB. Free memory is still 174.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 156.57 ms. Allocated memory is still 192.9 MB. Free memory was 158.1 MB in the beginning and 148.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.12 ms. Allocated memory is still 192.9 MB. Free memory was 148.3 MB in the beginning and 176.8 MB in the end (delta: -28.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 230.33 ms. Allocated memory is still 192.9 MB. Free memory was 176.8 MB in the beginning and 161.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 26.32 ms. Allocated memory is still 192.9 MB. Free memory was 161.6 MB in the beginning and 160.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4962.47 ms. Allocated memory was 192.9 MB in the beginning and 241.2 MB in the end (delta: 48.2 MB). Free memory was 160.0 MB in the beginning and 133.4 MB in the end (delta: 26.7 MB). Peak memory consumption was 75.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: 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, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4898.5ms, OverallIterations: 11, TraceHistogramMax: 10, EmptinessCheckTime: 18.6ms, AutomataDifference: 921.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 366 SDtfs, 100 SDslu, 1137 SDs, 0 SdLazy, 699 SolverSat, 87 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 493.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 425 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 401.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=10, InterpolantAutomatonStates: 70, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 78.1ms AutomataMinimizationTime, 11 MinimizatonAttempts, 9 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 70.0ms SsaConstructionTime, 215.0ms SatisfiabilityAnalysisTime, 1267.4ms InterpolantComputationTime, 436 NumberOfCodeBlocks, 419 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 425 ConstructedInterpolants, 0 QuantifiedInterpolants, 1303 SizeOfPredicates, 16 NumberOfNonLiveVariables, 1359 ConjunctsInSsa, 128 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 580/633 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...