/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/cohencu-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:10:35,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:10:35,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:10:35,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:10:35,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:10:35,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:10:35,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:10:35,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:10:35,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:10:35,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:10:35,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:10:35,919 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:10:35,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:10:35,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:10:35,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:10:35,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:10:35,922 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:10:35,923 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:10:35,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:10:35,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:10:35,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:10:35,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:10:35,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:10:35,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:10:35,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:10:35,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:10:35,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:10:35,940 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:10:35,946 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:10:35,969 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:10:35,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:10:35,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:10:35,971 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:10:35,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:10:35,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:10:35,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:10:35,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:10:35,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:10:35,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:10:35,971 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:10:35,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:10:35,972 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:10:35,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:10:35,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:10:35,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:10:35,972 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:10:35,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:10:35,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:10:35,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:10:35,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:10:35,974 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:10:35,974 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:10:36,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:10:36,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:10:36,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:10:36,319 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:10:36,320 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:10:36,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohencu-ll.c [2021-05-02 19:10:36,377 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ce89cbc6/5170f1dbb9224c8f94c46871a48d25e1/FLAG16d1e936f [2021-05-02 19:10:36,795 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:10:36,795 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/cohencu-ll.c [2021-05-02 19:10:36,802 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ce89cbc6/5170f1dbb9224c8f94c46871a48d25e1/FLAG16d1e936f [2021-05-02 19:10:36,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ce89cbc6/5170f1dbb9224c8f94c46871a48d25e1 [2021-05-02 19:10:36,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:10:36,825 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:10:36,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:10:36,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:10:36,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:10:36,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:10:36" (1/1) ... [2021-05-02 19:10:36,835 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7893a5f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:10:36, skipping insertion in model container [2021-05-02 19:10:36,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:10:36" (1/1) ... [2021-05-02 19:10:36,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:10:36,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:10:36,995 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/cohencu-ll.c[596,609] [2021-05-02 19:10:37,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:10:37,024 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:10:37,056 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/cohencu-ll.c[596,609] [2021-05-02 19:10:37,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:10:37,103 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:10:37,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:10:37 WrapperNode [2021-05-02 19:10:37,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:10:37,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:10:37,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:10:37,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:10:37,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:10:37" (1/1) ... [2021-05-02 19:10:37,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:10:37" (1/1) ... [2021-05-02 19:10:37,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:10:37" (1/1) ... [2021-05-02 19:10:37,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:10:37" (1/1) ... [2021-05-02 19:10:37,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:10:37" (1/1) ... [2021-05-02 19:10:37,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:10:37" (1/1) ... [2021-05-02 19:10:37,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:10:37" (1/1) ... [2021-05-02 19:10:37,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:10:37,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:10:37,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:10:37,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:10:37,140 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:10:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:10:37,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:10:37,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:10:37,216 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:10:37,216 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:10:37,216 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:10:37,216 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:10:37,216 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:10:37,217 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:10:37,217 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:10:37,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:10:37,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-05-02 19:10:37,217 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:10:37,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:10:37,217 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:10:37,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:10:37,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:10:37,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:10:37,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:10:37,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:10:37,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:10:37,417 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:10:37,418 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:10:37,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:10:37 BoogieIcfgContainer [2021-05-02 19:10:37,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:10:37,420 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:10:37,420 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:10:37,420 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:10:37,423 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:10:37" (1/1) ... [2021-05-02 19:10:37,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:10:37 BasicIcfg [2021-05-02 19:10:37,438 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:10:37,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:10:37,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:10:37,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:10:37,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:10:36" (1/4) ... [2021-05-02 19:10:37,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8d864c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:10:37, skipping insertion in model container [2021-05-02 19:10:37,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:10:37" (2/4) ... [2021-05-02 19:10:37,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8d864c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:10:37, skipping insertion in model container [2021-05-02 19:10:37,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:10:37" (3/4) ... [2021-05-02 19:10:37,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8d864c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:10:37, skipping insertion in model container [2021-05-02 19:10:37,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:10:37" (4/4) ... [2021-05-02 19:10:37,445 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll.cJordan [2021-05-02 19:10:37,450 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:10:37,453 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:10:37,467 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:10:37,483 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:10:37,483 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:10:37,483 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:10:37,483 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:10:37,483 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:10:37,483 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:10:37,483 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:10:37,484 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:10:37,494 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 19:10:37,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 19:10:37,500 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:10:37,500 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:10:37,501 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:10:37,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:10:37,505 INFO L82 PathProgramCache]: Analyzing trace with hash 825728577, now seen corresponding path program 1 times [2021-05-02 19:10:37,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:10:37,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122751326] [2021-05-02 19:10:37,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:10:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:10:37,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:10:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:10:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:10:37,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:10:37,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122751326] [2021-05-02 19:10:37,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122751326] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:10:37,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:10:37,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:10:37,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683072735] [2021-05-02 19:10:37,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:10:37,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:10:37,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:10:37,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:10:37,758 INFO L87 Difference]: Start difference. First operand has 30 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:10:37,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:10:37,929 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2021-05-02 19:10:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:10:37,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 19:10:37,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:10:37,938 INFO L225 Difference]: With dead ends: 30 [2021-05-02 19:10:37,939 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 19:10:37,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:10:37,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 19:10:37,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 19:10:37,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:10:37,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2021-05-02 19:10:37,990 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 11 [2021-05-02 19:10:37,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:10:37,990 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2021-05-02 19:10:37,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:10:37,990 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2021-05-02 19:10:37,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 19:10:37,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:10:37,991 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:10:37,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:10:37,991 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:10:37,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:10:37,994 INFO L82 PathProgramCache]: Analyzing trace with hash 827605410, now seen corresponding path program 1 times [2021-05-02 19:10:37,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:10:37,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401763537] [2021-05-02 19:10:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:10:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:10:38,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:10:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:10:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:10:38,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:10:38,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401763537] [2021-05-02 19:10:38,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401763537] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:10:38,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:10:38,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 19:10:38,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391849494] [2021-05-02 19:10:38,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:10:38,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:10:38,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:10:38,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:10:38,136 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:10:38,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:10:38,390 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2021-05-02 19:10:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:10:38,391 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 19:10:38,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:10:38,392 INFO L225 Difference]: With dead ends: 29 [2021-05-02 19:10:38,392 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 19:10:38,394 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:10:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 19:10:38,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 19:10:38,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:10:38,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2021-05-02 19:10:38,411 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 11 [2021-05-02 19:10:38,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:10:38,411 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2021-05-02 19:10:38,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:10:38,411 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2021-05-02 19:10:38,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 19:10:38,412 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:10:38,412 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:10:38,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 19:10:38,413 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:10:38,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:10:38,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1050612718, now seen corresponding path program 1 times [2021-05-02 19:10:38,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:10:38,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455610914] [2021-05-02 19:10:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:10:38,436 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:10:38,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081106474] [2021-05-02 19:10:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:10:38,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:10:38,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:10:38,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:10:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:10:38,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:10:38,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455610914] [2021-05-02 19:10:38,646 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:10:38,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081106474] [2021-05-02 19:10:38,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081106474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:10:38,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:10:38,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:10:38,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814667109] [2021-05-02 19:10:38,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:10:38,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:10:38,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:10:38,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:10:38,649 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:10:38,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:10:38,910 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2021-05-02 19:10:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:10:38,912 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-05-02 19:10:38,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:10:38,913 INFO L225 Difference]: With dead ends: 50 [2021-05-02 19:10:38,913 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 19:10:38,913 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:10:38,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 19:10:38,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-05-02 19:10:38,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:10:38,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2021-05-02 19:10:38,923 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 16 [2021-05-02 19:10:38,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:10:38,923 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2021-05-02 19:10:38,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:10:38,923 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2021-05-02 19:10:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 19:10:38,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:10:38,925 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:10:39,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 19:10:39,141 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:10:39,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:10:39,142 INFO L82 PathProgramCache]: Analyzing trace with hash 803025055, now seen corresponding path program 1 times [2021-05-02 19:10:39,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:10:39,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240330378] [2021-05-02 19:10:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:10:39,162 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:10:39,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038219733] [2021-05-02 19:10:39,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:10:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:10:39,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:10:39,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:10:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:10:39,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:10:39,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240330378] [2021-05-02 19:10:39,309 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:10:39,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038219733] [2021-05-02 19:10:39,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038219733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:10:39,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:10:39,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:10:39,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830517739] [2021-05-02 19:10:39,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:10:39,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:10:39,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:10:39,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:10:39,311 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:10:39,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:10:39,511 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-05-02 19:10:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:10:39,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2021-05-02 19:10:39,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:10:39,515 INFO L225 Difference]: With dead ends: 54 [2021-05-02 19:10:39,515 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 19:10:39,516 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:10:39,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 19:10:39,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 19:10:39,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:10:39,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2021-05-02 19:10:39,527 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 21 [2021-05-02 19:10:39,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:10:39,527 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2021-05-02 19:10:39,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:10:39,527 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2021-05-02 19:10:39,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 19:10:39,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:10:39,528 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:10:39,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:10:39,740 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:10:39,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:10:39,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1763121550, now seen corresponding path program 1 times [2021-05-02 19:10:39,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:10:39,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973778719] [2021-05-02 19:10:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:10:39,766 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:10:39,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957992868] [2021-05-02 19:10:39,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:10:39,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:10:39,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 19:10:39,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:10:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 19:10:39,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:10:39,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973778719] [2021-05-02 19:10:39,943 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:10:39,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957992868] [2021-05-02 19:10:39,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957992868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:10:39,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:10:39,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:10:39,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621854125] [2021-05-02 19:10:39,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:10:39,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:10:39,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:10:39,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:10:39,944 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:10:40,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:10:40,114 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-05-02 19:10:40,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:10:40,121 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2021-05-02 19:10:40,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:10:40,123 INFO L225 Difference]: With dead ends: 58 [2021-05-02 19:10:40,123 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 19:10:40,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:10:40,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 19:10:40,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-02 19:10:40,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 19:10:40,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-05-02 19:10:40,138 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 26 [2021-05-02 19:10:40,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:10:40,138 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-05-02 19:10:40,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:10:40,138 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-05-02 19:10:40,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 19:10:40,139 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:10:40,139 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:10:40,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:10:40,343 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:10:40,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:10:40,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1430292330, now seen corresponding path program 1 times [2021-05-02 19:10:40,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:10:40,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610229732] [2021-05-02 19:10:40,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:10:40,353 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:10:40,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230424473] [2021-05-02 19:10:40,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:10:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:10:40,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 19:10:40,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:10:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 19:10:40,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:10:40,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610229732] [2021-05-02 19:10:40,512 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:10:40,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230424473] [2021-05-02 19:10:40,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230424473] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:10:40,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:10:40,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:10:40,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698127888] [2021-05-02 19:10:40,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:10:40,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:10:40,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:10:40,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:10:40,514 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:10:40,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:10:40,722 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2021-05-02 19:10:40,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:10:40,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 43 [2021-05-02 19:10:40,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:10:40,724 INFO L225 Difference]: With dead ends: 73 [2021-05-02 19:10:40,724 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 19:10:40,725 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:10:40,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 19:10:40,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-05-02 19:10:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 34 states have (on average 1.088235294117647) internal successors, (37), 36 states have internal predecessors, (37), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 19:10:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 91 transitions. [2021-05-02 19:10:40,732 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 91 transitions. Word has length 43 [2021-05-02 19:10:40,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:10:40,733 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 91 transitions. [2021-05-02 19:10:40,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:10:40,733 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 91 transitions. [2021-05-02 19:10:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 19:10:40,734 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:10:40,734 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:10:40,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:10:40,945 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:10:40,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:10:40,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1152445511, now seen corresponding path program 2 times [2021-05-02 19:10:40,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:10:40,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194683743] [2021-05-02 19:10:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:10:40,985 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:10:40,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841955929] [2021-05-02 19:10:40,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:10:41,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:10:41,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:10:41,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:10:41,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:10:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 19:10:41,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:10:41,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194683743] [2021-05-02 19:10:41,207 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:10:41,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841955929] [2021-05-02 19:10:41,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841955929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:10:41,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:10:41,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:10:41,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474879431] [2021-05-02 19:10:41,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:10:41,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:10:41,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:10:41,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:10:41,210 INFO L87 Difference]: Start difference. First operand 72 states and 91 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:10:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:10:43,572 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2021-05-02 19:10:43,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:10:43,572 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 48 [2021-05-02 19:10:43,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:10:43,573 INFO L225 Difference]: With dead ends: 77 [2021-05-02 19:10:43,573 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 19:10:43,574 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:10:43,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 19:10:43,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-02 19:10:43,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 39 states have internal predecessors, (40), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 19:10:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2021-05-02 19:10:43,579 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 48 [2021-05-02 19:10:43,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:10:43,580 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2021-05-02 19:10:43,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:10:43,580 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2021-05-02 19:10:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 19:10:43,581 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:10:43,581 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:10:43,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 19:10:43,801 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:10:43,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:10:43,801 INFO L82 PathProgramCache]: Analyzing trace with hash -979702954, now seen corresponding path program 1 times [2021-05-02 19:10:43,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:10:43,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529879597] [2021-05-02 19:10:43,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:10:43,810 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:10:43,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257583740] [2021-05-02 19:10:43,811 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 [2021-05-02 19:10:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:10:43,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 19:10:43,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:10:43,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:43,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:43,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:43,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:43,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:43,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:43,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:43,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:43,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:43,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:44,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:44,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:44,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:44,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:44,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 51 proven. 8 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 19:10:44,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:10:44,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529879597] [2021-05-02 19:10:44,101 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:10:44,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257583740] [2021-05-02 19:10:44,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257583740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:10:44,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:10:44,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:10:44,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398125080] [2021-05-02 19:10:44,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:10:44,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:10:44,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:10:44,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:10:44,103 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 10 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:10:44,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:10:44,321 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2021-05-02 19:10:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:10:44,322 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 69 [2021-05-02 19:10:44,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:10:44,326 INFO L225 Difference]: With dead ends: 79 [2021-05-02 19:10:44,326 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 19:10:44,326 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:10:44,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 19:10:44,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-02 19:10:44,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 40 states have (on average 1.075) internal successors, (43), 42 states have internal predecessors, (43), 27 states have call successors, (27), 12 states have call predecessors, (27), 11 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 19:10:44,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2021-05-02 19:10:44,346 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 69 [2021-05-02 19:10:44,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:10:44,347 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2021-05-02 19:10:44,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:10:44,347 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2021-05-02 19:10:44,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 19:10:44,348 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:10:44,348 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:10:44,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:10:44,549 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:10:44,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:10:44,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1521314542, now seen corresponding path program 3 times [2021-05-02 19:10:44,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:10:44,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504187189] [2021-05-02 19:10:44,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:10:44,560 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:10:44,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758867605] [2021-05-02 19:10:44,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:10:44,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:10:44,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:10:44,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 19:10:44,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:10:44,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:44,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 51 proven. 14 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 19:10:44,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:10:44,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504187189] [2021-05-02 19:10:44,916 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:10:44,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758867605] [2021-05-02 19:10:44,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758867605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:10:44,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:10:44,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:10:44,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783661645] [2021-05-02 19:10:44,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:10:44,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:10:44,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:10:44,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:10:44,918 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:10:45,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:10:45,255 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2021-05-02 19:10:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:10:45,255 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 70 [2021-05-02 19:10:45,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:10:45,259 INFO L225 Difference]: With dead ends: 100 [2021-05-02 19:10:45,259 INFO L226 Difference]: Without dead ends: 99 [2021-05-02 19:10:45,260 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:10:45,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-02 19:10:45,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-05-02 19:10:45,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 51 states have internal predecessors, (52), 36 states have call successors, (36), 14 states have call predecessors, (36), 13 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 19:10:45,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2021-05-02 19:10:45,285 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 70 [2021-05-02 19:10:45,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:10:45,285 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2021-05-02 19:10:45,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:10:45,286 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2021-05-02 19:10:45,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 19:10:45,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:10:45,287 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:10:45,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 19:10:45,488 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:10:45,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:10:45,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2136552515, now seen corresponding path program 1 times [2021-05-02 19:10:45,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:10:45,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993182497] [2021-05-02 19:10:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:10:45,497 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:10:45,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204080141] [2021-05-02 19:10:45,497 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 [2021-05-02 19:10:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:10:45,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 19:10:45,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:10:45,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:45,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:45,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:45,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:45,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:45,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:45,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:45,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:45,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:45,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:45,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:45,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:45,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:45,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:45,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:45,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:45,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 53 proven. 11 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-05-02 19:10:45,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:10:45,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993182497] [2021-05-02 19:10:45,781 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:10:45,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204080141] [2021-05-02 19:10:45,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204080141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:10:45,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:10:45,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:10:45,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854973091] [2021-05-02 19:10:45,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:10:45,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:10:45,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:10:45,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:10:45,783 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand has 10 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 19:10:46,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:10:46,055 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2021-05-02 19:10:46,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:10:46,056 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 74 [2021-05-02 19:10:46,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:10:46,058 INFO L225 Difference]: With dead ends: 102 [2021-05-02 19:10:46,058 INFO L226 Difference]: Without dead ends: 91 [2021-05-02 19:10:46,058 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:10:46,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-02 19:10:46,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-05-02 19:10:46,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 47 states have internal predecessors, (48), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 19:10:46,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2021-05-02 19:10:46,064 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 74 [2021-05-02 19:10:46,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:10:46,065 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2021-05-02 19:10:46,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 19:10:46,065 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2021-05-02 19:10:46,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 19:10:46,066 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:10:46,066 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:10:46,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 19:10:46,291 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:10:46,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:10:46,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2106402719, now seen corresponding path program 4 times [2021-05-02 19:10:46,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:10:46,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791775192] [2021-05-02 19:10:46,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:10:46,300 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:10:46,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190130722] [2021-05-02 19:10:46,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 19:10:46,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:10:46,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:10:46,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 19:10:46,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:10:46,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:46,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:48,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:48,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:48,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:48,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:59,088 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 19:10:59,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:59,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:59,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:10:59,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:11:07,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:11:07,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:11:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 77 proven. 65 refuted. 2 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 19:11:08,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:11:08,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791775192] [2021-05-02 19:11:08,038 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:11:08,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190130722] [2021-05-02 19:11:08,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190130722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:11:08,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:11:08,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 19:11:08,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840760697] [2021-05-02 19:11:08,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 19:11:08,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:11:08,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 19:11:08,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=115, Unknown=7, NotChecked=0, Total=156 [2021-05-02 19:11:08,042 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 8 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 19:11:22,211 WARN L205 SmtUtils]: Spent 10.13 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 19:12:34,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:12:34,566 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2021-05-02 19:12:34,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:12:34,567 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 8 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) Word has length 75 [2021-05-02 19:12:34,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:12:34,568 INFO L225 Difference]: With dead ends: 111 [2021-05-02 19:12:34,568 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 19:12:34,568 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 35591.7ms TimeCoverageRelationStatistics Valid=54, Invalid=177, Unknown=9, NotChecked=0, Total=240 [2021-05-02 19:12:34,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 19:12:34,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-02 19:12:34,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 60 states have (on average 1.05) internal successors, (63), 62 states have internal predecessors, (63), 31 states have call successors, (31), 18 states have call predecessors, (31), 17 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 19:12:34,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2021-05-02 19:12:34,574 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 75 [2021-05-02 19:12:34,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:12:34,575 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2021-05-02 19:12:34,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 8 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 19:12:34,575 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2021-05-02 19:12:34,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 19:12:34,576 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:12:34,576 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:12:34,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:12:34,793 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:12:34,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:12:34,794 INFO L82 PathProgramCache]: Analyzing trace with hash -842431858, now seen corresponding path program 5 times [2021-05-02 19:12:34,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:12:34,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874417416] [2021-05-02 19:12:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:12:34,805 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:12:34,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656286699] [2021-05-02 19:12:34,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 19:12:34,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 19:12:34,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:12:34,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 19:12:34,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:12:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 78 proven. 31 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-05-02 19:12:35,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:12:35,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874417416] [2021-05-02 19:12:35,100 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:12:35,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656286699] [2021-05-02 19:12:35,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656286699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:12:35,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:12:35,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:12:35,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891756933] [2021-05-02 19:12:35,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:12:35,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:12:35,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:12:35,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:12:35,102 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 19:12:35,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:12:35,393 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2021-05-02 19:12:35,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:12:35,394 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 80 [2021-05-02 19:12:35,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:12:35,395 INFO L225 Difference]: With dead ends: 117 [2021-05-02 19:12:35,395 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 19:12:35,395 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:12:35,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 19:12:35,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-05-02 19:12:35,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 68 states have internal predecessors, (69), 30 states have call successors, (30), 20 states have call predecessors, (30), 19 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 19:12:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2021-05-02 19:12:35,401 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 80 [2021-05-02 19:12:35,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:12:35,401 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2021-05-02 19:12:35,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 19:12:35,401 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2021-05-02 19:12:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 19:12:35,402 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:12:35,402 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:12:35,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:12:35,603 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:12:35,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:12:35,604 INFO L82 PathProgramCache]: Analyzing trace with hash -29772034, now seen corresponding path program 2 times [2021-05-02 19:12:35,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:12:35,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755564306] [2021-05-02 19:12:35,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:12:35,610 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:12:35,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254128288] [2021-05-02 19:12:35,610 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:12:35,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:12:35,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:12:35,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 19:12:35,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:12:35,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 46 proven. 52 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-05-02 19:12:35,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:12:35,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755564306] [2021-05-02 19:12:35,979 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:12:35,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254128288] [2021-05-02 19:12:35,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254128288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:12:35,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:12:35,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:12:35,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316168698] [2021-05-02 19:12:35,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:12:35,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:12:35,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:12:35,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:12:35,981 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 19:12:38,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:12:38,311 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2021-05-02 19:12:38,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:12:38,311 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 96 [2021-05-02 19:12:38,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:12:38,312 INFO L225 Difference]: With dead ends: 120 [2021-05-02 19:12:38,312 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 19:12:38,313 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:12:38,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 19:12:38,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-05-02 19:12:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 71 states have internal predecessors, (72), 30 states have call successors, (30), 21 states have call predecessors, (30), 20 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 19:12:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2021-05-02 19:12:38,317 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 96 [2021-05-02 19:12:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:12:38,317 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2021-05-02 19:12:38,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 19:12:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2021-05-02 19:12:38,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 19:12:38,319 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:12:38,319 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:12:38,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 19:12:38,533 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:12:38,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:12:38,534 INFO L82 PathProgramCache]: Analyzing trace with hash 2146398619, now seen corresponding path program 2 times [2021-05-02 19:12:38,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:12:38,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576917914] [2021-05-02 19:12:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:12:38,541 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:12:38,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918351991] [2021-05-02 19:12:38,541 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:12:38,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:12:38,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:12:38,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 19:12:38,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:12:38,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:38,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:38,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:38,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:38,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:38,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:38,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:38,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:38,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:38,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:38,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:38,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:38,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:38,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:38,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:38,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:38,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:12:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 78 proven. 25 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 19:12:38,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:12:38,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576917914] [2021-05-02 19:12:38,876 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:12:38,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918351991] [2021-05-02 19:12:38,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918351991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:12:38,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:12:38,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:12:38,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139658389] [2021-05-02 19:12:38,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:12:38,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:12:38,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:12:38,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:12:38,878 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-02 19:12:39,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:12:39,160 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2021-05-02 19:12:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:12:39,161 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) Word has length 101 [2021-05-02 19:12:39,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:12:39,162 INFO L225 Difference]: With dead ends: 124 [2021-05-02 19:12:39,162 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 19:12:39,162 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:12:39,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 19:12:39,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-05-02 19:12:39,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 67 states have internal predecessors, (68), 27 states have call successors, (27), 20 states have call predecessors, (27), 19 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 19:12:39,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 120 transitions. [2021-05-02 19:12:39,178 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 120 transitions. Word has length 101 [2021-05-02 19:12:39,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:12:39,179 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 120 transitions. [2021-05-02 19:12:39,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-02 19:12:39,179 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 120 transitions. [2021-05-02 19:12:39,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 19:12:39,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:12:39,180 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:12:39,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 19:12:39,381 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:12:39,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:12:39,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1860018714, now seen corresponding path program 6 times [2021-05-02 19:12:39,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:12:39,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587056813] [2021-05-02 19:12:39,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:12:39,388 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:12:39,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446835086] [2021-05-02 19:12:39,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true