/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/egcd3-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:22:02,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:22:02,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:22:02,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 08:22:02,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:22:02,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:22:02,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:22:02,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:22:02,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:22:02,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:22:02,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:22:02,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:22:02,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:22:02,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:22:02,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:22:02,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:22:02,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:22:02,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:22:02,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:22:02,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:22:02,938 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:22:02,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:22:02,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:22:02,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:22:02,954 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:22:02,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:22:02,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:22:02,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:22:02,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:22:02,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:22:02,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:22:02,955 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:22:02,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:22:02,955 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:22:02,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:22:02,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:22:02,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:22:02,956 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:22:02,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:22:02,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:22:02,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:22:02,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:22:02,957 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:22:02,957 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:22:03,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:22:03,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:22:03,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:22:03,234 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:22:03,235 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:22:03,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c [2021-05-06 08:22:03,292 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28d17900a/f5a77a6ce3c44aefbc83b2a0436e1377/FLAGa898f5338 [2021-05-06 08:22:03,596 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:22:03,597 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c [2021-05-06 08:22:03,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28d17900a/f5a77a6ce3c44aefbc83b2a0436e1377/FLAGa898f5338 [2021-05-06 08:22:04,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28d17900a/f5a77a6ce3c44aefbc83b2a0436e1377 [2021-05-06 08:22:04,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:22:04,024 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:22:04,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:22:04,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:22:04,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:22:04,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:22:04" (1/1) ... [2021-05-06 08:22:04,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@618b567f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:04, skipping insertion in model container [2021-05-06 08:22:04,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:22:04" (1/1) ... [2021-05-06 08:22:04,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:22:04,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:22:04,148 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/egcd3-ll_valuebound1.c[490,503] [2021-05-06 08:22:04,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:22:04,191 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:22:04,209 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/egcd3-ll_valuebound1.c[490,503] [2021-05-06 08:22:04,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:22:04,241 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:22:04,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:04 WrapperNode [2021-05-06 08:22:04,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:22:04,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:22:04,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:22:04,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:22:04,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:04" (1/1) ... [2021-05-06 08:22:04,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:04" (1/1) ... [2021-05-06 08:22:04,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:04" (1/1) ... [2021-05-06 08:22:04,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:04" (1/1) ... [2021-05-06 08:22:04,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:04" (1/1) ... [2021-05-06 08:22:04,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:04" (1/1) ... [2021-05-06 08:22:04,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:04" (1/1) ... [2021-05-06 08:22:04,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:22:04,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:22:04,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:22:04,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:22:04,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:04" (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 08:22:04,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:22:04,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:22:04,341 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:22:04,341 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:22:04,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:22:04,341 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:22:04,341 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:22:04,341 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:22:04,341 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:22:04,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:22:04,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:22:04,342 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:22:04,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:22:04,343 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:22:04,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:22:04,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:22:04,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:22:04,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:22:04,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:22:04,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:22:04,647 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:22:04,647 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 08:22:04,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:04 BoogieIcfgContainer [2021-05-06 08:22:04,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:22:04,649 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:22:04,649 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:22:04,649 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:22:04,651 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:04" (1/1) ... [2021-05-06 08:22:04,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:22:04 BasicIcfg [2021-05-06 08:22:04,661 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:22:04,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:22:04,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:22:04,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:22:04,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:22:04" (1/4) ... [2021-05-06 08:22:04,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25501f01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:22:04, skipping insertion in model container [2021-05-06 08:22:04,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:22:04" (2/4) ... [2021-05-06 08:22:04,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25501f01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:22:04, skipping insertion in model container [2021-05-06 08:22:04,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:22:04" (3/4) ... [2021-05-06 08:22:04,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25501f01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:22:04, skipping insertion in model container [2021-05-06 08:22:04,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:22:04" (4/4) ... [2021-05-06 08:22:04,666 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound1.cJordan [2021-05-06 08:22:04,669 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:22:04,672 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:22:04,682 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:22:04,695 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:22:04,695 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:22:04,695 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:22:04,695 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:22:04,695 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:22:04,695 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:22:04,695 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:22:04,695 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:22:04,703 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:22:04,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:22:04,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:04,708 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:04,709 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:04,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:04,712 INFO L82 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2021-05-06 08:22:04,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:04,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654848670] [2021-05-06 08:22:04,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:04,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:22:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:04,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:22:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:04,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:22:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:04,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:22:04,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:04,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:22:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:04,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:04,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654848670] [2021-05-06 08:22:04,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654848670] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:04,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:04,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:22:04,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398015195] [2021-05-06 08:22:04,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:22:04,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:04,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:22:04,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:22:04,911 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:04,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:04,980 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-05-06 08:22:04,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:22:04,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:22:04,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:04,986 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:22:04,986 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:22:04,987 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:22:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:22:05,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:22:05,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:22:05,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 08:22:05,010 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-06 08:22:05,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:05,010 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 08:22:05,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:05,010 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 08:22:05,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 08:22:05,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:05,011 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:05,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:22:05,012 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:05,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:05,012 INFO L82 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2021-05-06 08:22:05,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:05,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020297292] [2021-05-06 08:22:05,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:05,028 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:05,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968576101] [2021-05-06 08:22:05,028 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 08:22:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:05,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:22:05,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:05,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:22:05,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:05,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020297292] [2021-05-06 08:22:05,227 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:05,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968576101] [2021-05-06 08:22:05,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968576101] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:05,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:05,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:22:05,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890723132] [2021-05-06 08:22:05,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:22:05,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:05,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:22:05,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:22:05,230 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:05,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:05,327 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-06 08:22:05,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:22:05,328 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-06 08:22:05,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:05,329 INFO L225 Difference]: With dead ends: 47 [2021-05-06 08:22:05,329 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 08:22:05,329 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:05,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 08:22:05,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-06 08:22:05,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 08:22:05,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 08:22:05,347 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-06 08:22:05,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:05,348 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 08:22:05,348 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:22:05,348 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 08:22:05,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 08:22:05,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:05,349 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:05,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:22:05,550 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:05,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:05,550 INFO L82 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2021-05-06 08:22:05,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:05,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277146849] [2021-05-06 08:22:05,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:05,562 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:05,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118349674] [2021-05-06 08:22:05,562 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 08:22:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:05,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:22:05,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:05,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:05,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:05,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277146849] [2021-05-06 08:22:05,915 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:05,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118349674] [2021-05-06 08:22:05,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118349674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:05,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:05,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:05,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320083292] [2021-05-06 08:22:05,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:05,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:05,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:05,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:05,917 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:06,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:06,133 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2021-05-06 08:22:06,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:06,133 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-06 08:22:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:06,135 INFO L225 Difference]: With dead ends: 61 [2021-05-06 08:22:06,135 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 08:22:06,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:22:06,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 08:22:06,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2021-05-06 08:22:06,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:22:06,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-06 08:22:06,141 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-06 08:22:06,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:06,142 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-06 08:22:06,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:06,142 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-06 08:22:06,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:22:06,143 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:06,143 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:06,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:06,353 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:06,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:06,354 INFO L82 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2021-05-06 08:22:06,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:06,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148071088] [2021-05-06 08:22:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:06,377 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:06,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200463119] [2021-05-06 08:22:06,377 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 08:22:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:06,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:22:06,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:06,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:22:06,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:06,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148071088] [2021-05-06 08:22:06,557 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:06,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200463119] [2021-05-06 08:22:06,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200463119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:06,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:06,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:06,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400412300] [2021-05-06 08:22:06,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:06,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:06,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:06,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:06,559 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:06,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:06,708 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2021-05-06 08:22:06,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:06,709 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 08:22:06,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:06,713 INFO L225 Difference]: With dead ends: 96 [2021-05-06 08:22:06,713 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 08:22:06,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:06,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 08:22:06,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-06 08:22:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:22:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-06 08:22:06,735 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-06 08:22:06,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:06,735 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-06 08:22:06,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:22:06,736 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-06 08:22:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:22:06,736 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:06,736 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:06,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:06,957 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:06,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:06,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2021-05-06 08:22:06,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:06,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818908543] [2021-05-06 08:22:06,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:06,968 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:06,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859560426] [2021-05-06 08:22:06,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:07,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:22:07,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:07,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:07,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:07,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818908543] [2021-05-06 08:22:07,233 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:07,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859560426] [2021-05-06 08:22:07,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859560426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:07,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:07,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:07,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281977806] [2021-05-06 08:22:07,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:07,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:07,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:07,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:07,234 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:22:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:07,459 INFO L93 Difference]: Finished difference Result 84 states and 112 transitions. [2021-05-06 08:22:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:22:07,459 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 08:22:07,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:07,460 INFO L225 Difference]: With dead ends: 84 [2021-05-06 08:22:07,460 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 08:22:07,460 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:07,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 08:22:07,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-05-06 08:22:07,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:22:07,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-06 08:22:07,466 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-06 08:22:07,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:07,466 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-06 08:22:07,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 08:22:07,466 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-06 08:22:07,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 08:22:07,467 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:07,467 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:07,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:07,684 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:07,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:07,685 INFO L82 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2021-05-06 08:22:07,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:07,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303581028] [2021-05-06 08:22:07,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:07,695 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:07,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316554557] [2021-05-06 08:22:07,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:07,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:22:07,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:07,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:22:07,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:07,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303581028] [2021-05-06 08:22:07,851 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:07,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316554557] [2021-05-06 08:22:07,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316554557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:07,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:07,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:22:07,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182965231] [2021-05-06 08:22:07,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:22:07,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:07,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:22:07,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:22:07,852 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:22:07,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:07,954 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2021-05-06 08:22:07,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:22:07,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-05-06 08:22:07,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:07,955 INFO L225 Difference]: With dead ends: 64 [2021-05-06 08:22:07,955 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 08:22:07,955 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:07,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 08:22:07,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2021-05-06 08:22:07,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:22:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2021-05-06 08:22:07,963 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 42 [2021-05-06 08:22:07,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:07,963 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2021-05-06 08:22:07,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:22:07,964 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2021-05-06 08:22:07,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 08:22:07,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:07,965 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:08,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:22:08,186 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:08,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:08,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2021-05-06 08:22:08,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:08,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102462623] [2021-05-06 08:22:08,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:08,200 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:08,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039287195] [2021-05-06 08:22:08,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:08,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:22:08,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:08,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 08:22:08,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:08,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102462623] [2021-05-06 08:22:08,374 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:08,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039287195] [2021-05-06 08:22:08,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039287195] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:22:08,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:22:08,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 08:22:08,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101296461] [2021-05-06 08:22:08,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:22:08,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:08,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:22:08,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:22:08,375 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:08,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:08,481 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-05-06 08:22:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:22:08,481 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-06 08:22:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:08,482 INFO L225 Difference]: With dead ends: 68 [2021-05-06 08:22:08,482 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 08:22:08,482 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:22:08,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 08:22:08,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-05-06 08:22:08,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.175) internal successors, (47), 41 states have internal predecessors, (47), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:22:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2021-05-06 08:22:08,486 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 47 [2021-05-06 08:22:08,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:08,486 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2021-05-06 08:22:08,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:22:08,486 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2021-05-06 08:22:08,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 08:22:08,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:08,487 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:08,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:08,697 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:08,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:08,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2021-05-06 08:22:08,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:08,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834431870] [2021-05-06 08:22:08,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:08,706 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:08,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077094329] [2021-05-06 08:22:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:08,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:22:08,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:08,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:22:08,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:08,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834431870] [2021-05-06 08:22:08,925 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:08,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077094329] [2021-05-06 08:22:08,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077094329] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:08,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:08,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:08,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705176684] [2021-05-06 08:22:08,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:08,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:08,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:08,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:08,927 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:22:09,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:09,066 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2021-05-06 08:22:09,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:22:09,066 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2021-05-06 08:22:09,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:09,067 INFO L225 Difference]: With dead ends: 71 [2021-05-06 08:22:09,067 INFO L226 Difference]: Without dead ends: 71 [2021-05-06 08:22:09,068 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:09,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-06 08:22:09,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-05-06 08:22:09,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 08:22:09,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2021-05-06 08:22:09,071 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 52 [2021-05-06 08:22:09,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:09,071 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2021-05-06 08:22:09,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:22:09,071 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2021-05-06 08:22:09,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 08:22:09,072 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:09,072 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:09,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:09,285 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:09,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:09,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2021-05-06 08:22:09,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:09,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318021143] [2021-05-06 08:22:09,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:09,293 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:09,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061547090] [2021-05-06 08:22:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 08:22:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:09,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 08:22:09,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:09,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-06 08:22:09,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:09,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318021143] [2021-05-06 08:22:09,726 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:09,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061547090] [2021-05-06 08:22:09,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061547090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:09,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:09,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:22:09,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024966253] [2021-05-06 08:22:09,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:22:09,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:09,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:22:09,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:22:09,727 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:22:10,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:10,172 INFO L93 Difference]: Finished difference Result 99 states and 124 transitions. [2021-05-06 08:22:10,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:22:10,173 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2021-05-06 08:22:10,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:10,174 INFO L225 Difference]: With dead ends: 99 [2021-05-06 08:22:10,174 INFO L226 Difference]: Without dead ends: 98 [2021-05-06 08:22:10,174 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 337.1ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:22:10,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-06 08:22:10,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2021-05-06 08:22:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 58 states have internal predecessors, (65), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:22:10,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 109 transitions. [2021-05-06 08:22:10,178 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 109 transitions. Word has length 64 [2021-05-06 08:22:10,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:10,179 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 109 transitions. [2021-05-06 08:22:10,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:22:10,179 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 109 transitions. [2021-05-06 08:22:10,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:22:10,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:10,180 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:10,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:22:10,397 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:10,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:10,397 INFO L82 PathProgramCache]: Analyzing trace with hash 248272623, now seen corresponding path program 2 times [2021-05-06 08:22:10,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:10,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410094067] [2021-05-06 08:22:10,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:10,405 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:10,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808565846] [2021-05-06 08:22:10,406 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 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 08:22:10,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:22:10,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:22:10,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:22:10,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:10,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:22:10,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:10,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410094067] [2021-05-06 08:22:10,572 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:10,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808565846] [2021-05-06 08:22:10,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808565846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:10,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:10,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:22:10,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673938996] [2021-05-06 08:22:10,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:22:10,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:10,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:22:10,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:22:10,573 INFO L87 Difference]: Start difference. First operand 89 states and 109 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:10,736 INFO L93 Difference]: Finished difference Result 136 states and 180 transitions. [2021-05-06 08:22:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:22:10,737 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-06 08:22:10,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:10,738 INFO L225 Difference]: With dead ends: 136 [2021-05-06 08:22:10,738 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 08:22:10,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:22:10,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 08:22:10,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 99. [2021-05-06 08:22:10,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.126984126984127) internal successors, (71), 64 states have internal predecessors, (71), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 08:22:10,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-05-06 08:22:10,743 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 69 [2021-05-06 08:22:10,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:10,743 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-05-06 08:22:10,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:22:10,743 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-05-06 08:22:10,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 08:22:10,744 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:22:10,744 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:22:10,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:10,957 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:22:10,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:22:10,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1757299226, now seen corresponding path program 1 times [2021-05-06 08:22:10,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:22:10,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642363700] [2021-05-06 08:22:10,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:22:10,975 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:22:10,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [374957699] [2021-05-06 08:22:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:22:11,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:22:11,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:22:11,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:22:11,196 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 11 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-05-06 08:22:11,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:22:11,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642363700] [2021-05-06 08:22:11,197 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:22:11,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374957699] [2021-05-06 08:22:11,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374957699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:22:11,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:22:11,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:22:11,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800898451] [2021-05-06 08:22:11,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:22:11,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:22:11,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:22:11,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:22:11,198 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:22:11,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:22:11,317 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-05-06 08:22:11,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:22:11,317 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 72 [2021-05-06 08:22:11,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:22:11,317 INFO L225 Difference]: With dead ends: 48 [2021-05-06 08:22:11,317 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:22:11,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:22:11,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:22:11,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:22:11,318 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 08:22:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:22:11,318 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 72 [2021-05-06 08:22:11,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:22:11,318 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:22:11,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:22:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:22:11,318 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:22:11,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:22:11,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:22:11 BasicIcfg [2021-05-06 08:22:11,536 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:22:11,537 INFO L168 Benchmark]: Toolchain (without parser) took 7512.68 ms. Allocated memory was 194.0 MB in the beginning and 232.8 MB in the end (delta: 38.8 MB). Free memory was 158.3 MB in the beginning and 104.8 MB in the end (delta: 53.5 MB). Peak memory consumption was 93.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:11,537 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 194.0 MB. Free memory is still 174.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:22:11,537 INFO L168 Benchmark]: CACSL2BoogieTranslator took 214.42 ms. Allocated memory is still 194.0 MB. Free memory was 158.1 MB in the beginning and 176.0 MB in the end (delta: -17.9 MB). Peak memory consumption was 15.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:11,537 INFO L168 Benchmark]: Boogie Preprocessor took 18.93 ms. Allocated memory is still 194.0 MB. Free memory was 176.0 MB in the beginning and 174.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:11,537 INFO L168 Benchmark]: RCFGBuilder took 386.20 ms. Allocated memory is still 194.0 MB. Free memory was 174.4 MB in the beginning and 157.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:11,537 INFO L168 Benchmark]: IcfgTransformer took 12.56 ms. Allocated memory is still 194.0 MB. Free memory was 157.6 MB in the beginning and 156.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:11,537 INFO L168 Benchmark]: TraceAbstraction took 6874.10 ms. Allocated memory was 194.0 MB in the beginning and 232.8 MB in the end (delta: 38.8 MB). Free memory was 156.0 MB in the beginning and 104.8 MB in the end (delta: 51.2 MB). Peak memory consumption was 91.5 MB. Max. memory is 8.0 GB. [2021-05-06 08:22:11,537 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 194.0 MB. Free memory is still 174.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 214.42 ms. Allocated memory is still 194.0 MB. Free memory was 158.1 MB in the beginning and 176.0 MB in the end (delta: -17.9 MB). Peak memory consumption was 15.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.93 ms. Allocated memory is still 194.0 MB. Free memory was 176.0 MB in the beginning and 174.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 386.20 ms. Allocated memory is still 194.0 MB. Free memory was 174.4 MB in the beginning and 157.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 12.56 ms. Allocated memory is still 194.0 MB. Free memory was 157.6 MB in the beginning and 156.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6874.10 ms. Allocated memory was 194.0 MB in the beginning and 232.8 MB in the end (delta: 38.8 MB). Free memory was 156.0 MB in the beginning and 104.8 MB in the end (delta: 51.2 MB). Peak memory consumption was 91.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6840.2ms, OverallIterations: 11, TraceHistogramMax: 6, EmptinessCheckTime: 14.5ms, AutomataDifference: 1880.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 456 SDtfs, 535 SDslu, 2009 SDs, 0 SdLazy, 1531 SolverSat, 302 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 903.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 559 GetRequests, 429 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1209.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=10, InterpolantAutomatonStates: 110, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 85.9ms AutomataMinimizationTime, 11 MinimizatonAttempts, 114 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 90.8ms SsaConstructionTime, 230.9ms SatisfiabilityAnalysisTime, 1911.8ms InterpolantComputationTime, 531 NumberOfCodeBlocks, 531 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 520 ConstructedInterpolants, 0 QuantifiedInterpolants, 2019 SizeOfPredicates, 51 NumberOfNonLiveVariables, 1809 ConjunctsInSsa, 184 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 378/440 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...