/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:12:29,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:12:29,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:12:29,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:12:29,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:12:29,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:12:29,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:12:29,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:12:29,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:12:29,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:12:29,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:12:29,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:12:29,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:12:29,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:12:29,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:12:29,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:12:29,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:12:29,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:12:29,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:12:29,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:12:29,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:12:29,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:12:29,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:12:29,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:12:29,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:12:29,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:12:29,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:12:29,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:12:29,558 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:12:29,568 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:12:29,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:12:29,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:12:29,570 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:12:29,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:12:29,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:12:29,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:12:29,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:12:29,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:12:29,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:12:29,570 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:12:29,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:12:29,571 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:12:29,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:12:29,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:12:29,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:12:29,571 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:12:29,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:12:29,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:12:29,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:12:29,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:12:29,572 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:12:29,572 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:12:29,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:12:29,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:12:29,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:12:29,848 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:12:29,849 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:12:29,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c [2021-05-06 10:12:29,910 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90d47a85d/2f82bf4e33944ca2bcfe0b1afb51f42f/FLAGb9e809211 [2021-05-06 10:12:30,270 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:12:30,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c [2021-05-06 10:12:30,275 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90d47a85d/2f82bf4e33944ca2bcfe0b1afb51f42f/FLAGb9e809211 [2021-05-06 10:12:30,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90d47a85d/2f82bf4e33944ca2bcfe0b1afb51f42f [2021-05-06 10:12:30,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:12:30,293 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:12:30,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:12:30,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:12:30,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:12:30,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:12:30" (1/1) ... [2021-05-06 10:12:30,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22f40edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:12:30, skipping insertion in model container [2021-05-06 10:12:30,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:12:30" (1/1) ... [2021-05-06 10:12:30,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:12:30,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:12:30,443 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c[537,550] [2021-05-06 10:12:30,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:12:30,461 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:12:30,485 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c[537,550] [2021-05-06 10:12:30,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:12:30,523 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:12:30,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:12:30 WrapperNode [2021-05-06 10:12:30,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:12:30,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:12:30,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:12:30,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:12:30,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:12:30" (1/1) ... [2021-05-06 10:12:30,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:12:30" (1/1) ... [2021-05-06 10:12:30,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:12:30" (1/1) ... [2021-05-06 10:12:30,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:12:30" (1/1) ... [2021-05-06 10:12:30,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:12:30" (1/1) ... [2021-05-06 10:12:30,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:12:30" (1/1) ... [2021-05-06 10:12:30,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:12:30" (1/1) ... [2021-05-06 10:12:30,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:12:30,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:12:30,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:12:30,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:12:30,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:12:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:12:30,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:12:30,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:12:30,627 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:12:30,627 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:12:30,628 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:12:30,628 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:12:30,628 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:12:30,628 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:12:30,628 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:12:30,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:12:30,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 10:12:30,629 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:12:30,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:12:30,629 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:12:30,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:12:30,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:12:30,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:12:30,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:12:30,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:12:30,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:12:30,784 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:12:30,784 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:12:30,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:12:30 BoogieIcfgContainer [2021-05-06 10:12:30,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:12:30,786 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:12:30,786 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:12:30,787 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:12:30,788 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:12:30" (1/1) ... [2021-05-06 10:12:30,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:12:30 BasicIcfg [2021-05-06 10:12:30,815 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:12:30,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:12:30,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:12:30,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:12:30,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:12:30" (1/4) ... [2021-05-06 10:12:30,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1e9826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:12:30, skipping insertion in model container [2021-05-06 10:12:30,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:12:30" (2/4) ... [2021-05-06 10:12:30,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1e9826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:12:30, skipping insertion in model container [2021-05-06 10:12:30,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:12:30" (3/4) ... [2021-05-06 10:12:30,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1e9826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:12:30, skipping insertion in model container [2021-05-06 10:12:30,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:12:30" (4/4) ... [2021-05-06 10:12:30,820 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound5.cJordan [2021-05-06 10:12:30,833 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:12:30,836 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:12:30,850 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:12:30,871 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:12:30,871 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:12:30,871 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:12:30,871 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:12:30,871 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:12:30,871 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:12:30,872 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:12:30,872 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:12:30,879 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:12:30,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:12:30,883 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:12:30,884 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:12:30,884 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:12:30,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:12:30,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1656134296, now seen corresponding path program 1 times [2021-05-06 10:12:30,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:12:30,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437582343] [2021-05-06 10:12:30,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:12:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:12:31,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:12:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:12:31,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:12:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:12:31,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 10:12:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:12:31,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 10:12:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:12:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:12:31,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:12:31,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437582343] [2021-05-06 10:12:31,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437582343] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:12:31,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:12:31,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:12:31,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753694916] [2021-05-06 10:12:31,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:12:31,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:12:31,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:12:31,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:12:31,102 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:12:31,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:12:31,151 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-05-06 10:12:31,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:12:31,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 10:12:31,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:12:31,156 INFO L225 Difference]: With dead ends: 32 [2021-05-06 10:12:31,156 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 10:12:31,157 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:12:31,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 10:12:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 10:12:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:12:31,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-06 10:12:31,177 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2021-05-06 10:12:31,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:12:31,178 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-06 10:12:31,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:12:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-06 10:12:31,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:12:31,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:12:31,179 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:12:31,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:12:31,179 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:12:31,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:12:31,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1063826184, now seen corresponding path program 1 times [2021-05-06 10:12:31,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:12:31,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013481598] [2021-05-06 10:12:31,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:12:31,199 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:12:31,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372083150] [2021-05-06 10:12:31,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:12:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:12:31,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 10:12:31,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:12:31,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 10:12:31,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:12:31,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013481598] [2021-05-06 10:12:31,424 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:12:31,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372083150] [2021-05-06 10:12:31,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372083150] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:12:31,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:12:31,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:12:31,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067319313] [2021-05-06 10:12:31,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:12:31,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:12:31,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:12:31,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:12:31,428 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:12:31,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:12:31,470 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-05-06 10:12:31,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:12:31,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 10:12:31,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:12:31,472 INFO L225 Difference]: With dead ends: 37 [2021-05-06 10:12:31,472 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 10:12:31,473 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:12:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 10:12:31,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-05-06 10:12:31,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:12:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-05-06 10:12:31,485 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2021-05-06 10:12:31,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:12:31,486 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-05-06 10:12:31,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 10:12:31,486 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-05-06 10:12:31,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:12:31,491 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:12:31,491 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:12:31,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:12:31,717 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:12:31,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:12:31,718 INFO L82 PathProgramCache]: Analyzing trace with hash -499634320, now seen corresponding path program 1 times [2021-05-06 10:12:31,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:12:31,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558796232] [2021-05-06 10:12:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:12:31,736 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:12:31,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317211321] [2021-05-06 10:12:31,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:12:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:12:31,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:12:31,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:12:31,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:31,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:31,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 10:12:31,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:12:31,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558796232] [2021-05-06 10:12:31,889 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:12:31,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317211321] [2021-05-06 10:12:31,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317211321] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:12:31,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:12:31,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 10:12:31,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218828036] [2021-05-06 10:12:31,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:12:31,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:12:31,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:12:31,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:12:31,890 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 10:12:31,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:12:31,953 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-06 10:12:31,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:12:31,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 10:12:31,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:12:31,955 INFO L225 Difference]: With dead ends: 36 [2021-05-06 10:12:31,955 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 10:12:31,955 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:12:31,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 10:12:31,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-05-06 10:12:31,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:12:31,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-06 10:12:31,962 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2021-05-06 10:12:31,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:12:31,963 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-06 10:12:31,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 10:12:31,963 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-06 10:12:31,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 10:12:31,964 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:12:31,965 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:12:32,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:12:32,177 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:12:32,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:12:32,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1096608558, now seen corresponding path program 1 times [2021-05-06 10:12:32,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:12:32,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941935456] [2021-05-06 10:12:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:12:32,186 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:12:32,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242692882] [2021-05-06 10:12:32,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:12:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:12:32,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 10:12:32,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:12:32,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 10:12:32,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:12:32,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941935456] [2021-05-06 10:12:32,726 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:12:32,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242692882] [2021-05-06 10:12:32,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242692882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:12:32,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:12:32,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 10:12:32,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878744379] [2021-05-06 10:12:32,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 10:12:32,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:12:32,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 10:12:32,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:12:32,727 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:12:32,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:12:32,929 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2021-05-06 10:12:32,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 10:12:32,930 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-06 10:12:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:12:32,931 INFO L225 Difference]: With dead ends: 47 [2021-05-06 10:12:32,931 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 10:12:32,931 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-06 10:12:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 10:12:32,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2021-05-06 10:12:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:12:32,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-05-06 10:12:32,934 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 37 [2021-05-06 10:12:32,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:12:32,934 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-05-06 10:12:32,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 10:12:32,934 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-05-06 10:12:32,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 10:12:32,935 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:12:32,935 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:12:33,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:12:33,151 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:12:33,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:12:33,152 INFO L82 PathProgramCache]: Analyzing trace with hash -209104877, now seen corresponding path program 1 times [2021-05-06 10:12:33,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:12:33,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782325582] [2021-05-06 10:12:33,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:12:33,163 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:12:33,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959173488] [2021-05-06 10:12:33,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:12:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:12:33,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 10:12:33,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:12:33,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 10:12:33,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:12:33,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782325582] [2021-05-06 10:12:33,422 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:12:33,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959173488] [2021-05-06 10:12:33,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959173488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:12:33,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:12:33,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:12:33,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497990740] [2021-05-06 10:12:33,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:12:33,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:12:33,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:12:33,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:12:33,423 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 10:12:33,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:12:33,522 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-05-06 10:12:33,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:12:33,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-06 10:12:33,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:12:33,524 INFO L225 Difference]: With dead ends: 52 [2021-05-06 10:12:33,524 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 10:12:33,525 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:12:33,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 10:12:33,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-05-06 10:12:33,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:12:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-05-06 10:12:33,528 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 37 [2021-05-06 10:12:33,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:12:33,528 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-05-06 10:12:33,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 10:12:33,528 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-05-06 10:12:33,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 10:12:33,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:12:33,529 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:12:33,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:12:33,729 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:12:33,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:12:33,730 INFO L82 PathProgramCache]: Analyzing trace with hash -266261558, now seen corresponding path program 1 times [2021-05-06 10:12:33,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:12:33,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954549873] [2021-05-06 10:12:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:12:33,737 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:12:33,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331674733] [2021-05-06 10:12:33,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:12:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:12:33,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 10:12:33,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:12:33,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:12:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 10:12:33,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:12:33,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954549873] [2021-05-06 10:12:33,910 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:12:33,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331674733] [2021-05-06 10:12:33,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331674733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:12:33,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:12:33,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:12:33,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998347882] [2021-05-06 10:12:33,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:12:33,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:12:33,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:12:33,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:12:33,912 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6)