/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/geo3-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:41:34,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:41:34,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:41:34,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:41:34,053 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:41:34,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:41:34,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:41:34,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:41:34,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:41:34,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:41:34,067 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:41:34,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:41:34,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:41:34,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:41:34,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:41:34,073 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:41:34,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:41:34,076 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:41:34,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:41:34,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:41:34,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:41:34,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:41:34,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:41:34,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:41:34,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:41:34,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:41:34,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:41:34,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:41:34,101 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:41:34,114 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:41:34,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:41:34,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:41:34,117 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:41:34,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:41:34,117 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:41:34,117 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:41:34,117 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:41:34,117 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:41:34,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:41:34,118 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:41:34,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:41:34,118 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:41:34,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:41:34,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:41:34,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:41:34,119 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:41:34,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:41:34,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:41:34,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:41:34,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:41:34,120 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:41:34,127 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:41:34,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:41:34,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:41:34,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:41:34,409 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:41:34,409 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:41:34,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound2.c [2021-05-06 08:41:34,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44a89e65d/9cba9a022fcd4d2f9fe592af72fe24a4/FLAG4163c4445 [2021-05-06 08:41:34,815 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:41:34,816 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound2.c [2021-05-06 08:41:34,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44a89e65d/9cba9a022fcd4d2f9fe592af72fe24a4/FLAG4163c4445 [2021-05-06 08:41:35,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44a89e65d/9cba9a022fcd4d2f9fe592af72fe24a4 [2021-05-06 08:41:35,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:41:35,262 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:41:35,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:41:35,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:41:35,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:41:35,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:41:35" (1/1) ... [2021-05-06 08:41:35,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aacc3ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:41:35, skipping insertion in model container [2021-05-06 08:41:35,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:41:35" (1/1) ... [2021-05-06 08:41:35,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:41:35,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:41:35,366 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/geo3-ll_unwindbound2.c[525,538] [2021-05-06 08:41:35,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:41:35,381 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:41:35,389 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/geo3-ll_unwindbound2.c[525,538] [2021-05-06 08:41:35,392 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:41:35,401 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:41:35,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:41:35 WrapperNode [2021-05-06 08:41:35,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:41:35,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:41:35,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:41:35,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:41:35,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:41:35" (1/1) ... [2021-05-06 08:41:35,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:41:35" (1/1) ... [2021-05-06 08:41:35,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:41:35" (1/1) ... [2021-05-06 08:41:35,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:41:35" (1/1) ... [2021-05-06 08:41:35,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:41:35" (1/1) ... [2021-05-06 08:41:35,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:41:35" (1/1) ... [2021-05-06 08:41:35,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:41:35" (1/1) ... [2021-05-06 08:41:35,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:41:35,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:41:35,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:41:35,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:41:35,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:41:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:41:35,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:41:35,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:41:35,522 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:41:35,522 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:41:35,522 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:41:35,523 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:41:35,523 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:41:35,523 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:41:35,523 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:41:35,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:41:35,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:41:35,524 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:41:35,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:41:35,524 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:41:35,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:41:35,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:41:35,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:41:35,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:41:35,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:41:35,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:41:35,730 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:41:35,731 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:41:35,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:41:35 BoogieIcfgContainer [2021-05-06 08:41:35,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:41:35,732 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:41:35,732 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:41:35,733 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:41:35,734 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:41:35" (1/1) ... [2021-05-06 08:41:35,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:41:35 BasicIcfg [2021-05-06 08:41:35,757 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:41:35,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:41:35,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:41:35,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:41:35,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:41:35" (1/4) ... [2021-05-06 08:41:35,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4786a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:41:35, skipping insertion in model container [2021-05-06 08:41:35,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:41:35" (2/4) ... [2021-05-06 08:41:35,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4786a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:41:35, skipping insertion in model container [2021-05-06 08:41:35,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:41:35" (3/4) ... [2021-05-06 08:41:35,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4786a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:41:35, skipping insertion in model container [2021-05-06 08:41:35,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:41:35" (4/4) ... [2021-05-06 08:41:35,778 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound2.cJordan [2021-05-06 08:41:35,788 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:41:35,791 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:41:35,807 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:41:35,829 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:41:35,829 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:41:35,829 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:41:35,830 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:41:35,830 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:41:35,830 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:41:35,830 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:41:35,830 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:41:35,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:41:35,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 08:41:35,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:41:35,857 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:41:35,857 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:41:35,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:41:35,862 INFO L82 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2021-05-06 08:41:35,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:41:35,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783443103] [2021-05-06 08:41:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:41:35,964 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:41:35,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006991706] [2021-05-06 08:41:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:41:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:41:36,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 08:41:36,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:41:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:41:36,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:41:36,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783443103] [2021-05-06 08:41:36,104 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:41:36,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006991706] [2021-05-06 08:41:36,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006991706] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:41:36,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:41:36,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 08:41:36,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449487735] [2021-05-06 08:41:36,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 08:41:36,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:41:36,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 08:41:36,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:41:36,119 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:41:36,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:41:36,128 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-06 08:41:36,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 08:41:36,129 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 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 [2021-05-06 08:41:36,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:41:36,134 INFO L225 Difference]: With dead ends: 22 [2021-05-06 08:41:36,134 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 08:41:36,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:41:36,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 08:41:36,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-06 08:41:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:41:36,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 08:41:36,155 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 08:41:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:41:36,155 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 08:41:36,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:41:36,156 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 08:41:36,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 08:41:36,156 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:41:36,156 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:41:36,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 08:41:36,374 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:41:36,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:41:36,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2021-05-06 08:41:36,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:41:36,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622207997] [2021-05-06 08:41:36,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:41:36,385 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:41:36,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201190728] [2021-05-06 08:41:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:41:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:41:36,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:41:36,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:41:36,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:36,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:36,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:36,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:36,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:41:36,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:41:36,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622207997] [2021-05-06 08:41:36,549 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:41:36,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201190728] [2021-05-06 08:41:36,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201190728] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:41:36,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:41:36,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:41:36,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126911767] [2021-05-06 08:41:36,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:41:36,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:41:36,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:41:36,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:41:36,556 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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) [2021-05-06 08:41:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:41:36,568 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-06 08:41:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:41:36,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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 12 [2021-05-06 08:41:36,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:41:36,572 INFO L225 Difference]: With dead ends: 19 [2021-05-06 08:41:36,572 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 08:41:36,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:41:36,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 08:41:36,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 08:41:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:41:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 08:41:36,580 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-06 08:41:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:41:36,586 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 08:41:36,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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) [2021-05-06 08:41:36,586 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 08:41:36,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 08:41:36,587 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:41:36,587 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:41:36,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:41:36,793 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:41:36,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:41:36,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2021-05-06 08:41:36,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:41:36,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986873968] [2021-05-06 08:41:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:41:36,802 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:41:36,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081225077] [2021-05-06 08:41:36,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:41:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:41:36,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:41:36,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:41:36,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:36,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:36,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:41:36,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:41:36,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986873968] [2021-05-06 08:41:36,924 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:41:36,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081225077] [2021-05-06 08:41:36,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081225077] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:41:36,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:41:36,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:41:36,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200939854] [2021-05-06 08:41:36,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:41:36,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:41:36,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:41:36,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:41:36,925 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:41:36,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:41:36,949 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 08:41:36,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:41:36,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 12 [2021-05-06 08:41:36,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:41:36,949 INFO L225 Difference]: With dead ends: 26 [2021-05-06 08:41:36,950 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 08:41:36,950 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:41:36,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 08:41:36,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 08:41:36,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:41:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 08:41:36,953 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-06 08:41:36,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:41:36,953 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 08:41:36,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:41:36,953 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 08:41:36,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:41:36,953 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:41:36,954 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:41:37,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:41:37,161 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:41:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:41:37,162 INFO L82 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2021-05-06 08:41:37,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:41:37,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322413199] [2021-05-06 08:41:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:41:37,172 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:41:37,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998087375] [2021-05-06 08:41:37,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:41:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:41:37,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:41:37,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:41:37,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:37,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:37,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:37,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:37,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:37,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:37,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:37,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:41:37,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:41:37,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322413199] [2021-05-06 08:41:37,291 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:41:37,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998087375] [2021-05-06 08:41:37,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998087375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:41:37,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:41:37,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:41:37,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594096254] [2021-05-06 08:41:37,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:41:37,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:41:37,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:41:37,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:41:37,293 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:41:37,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:41:37,312 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-05-06 08:41:37,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:41:37,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 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 20 [2021-05-06 08:41:37,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:41:37,313 INFO L225 Difference]: With dead ends: 27 [2021-05-06 08:41:37,313 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 08:41:37,314 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:41:37,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 08:41:37,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 08:41:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:41:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-06 08:41:37,316 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-06 08:41:37,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:41:37,316 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-06 08:41:37,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:41:37,316 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-06 08:41:37,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:41:37,317 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:41:37,317 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:41:37,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:41:37,537 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:41:37,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:41:37,538 INFO L82 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2021-05-06 08:41:37,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:41:37,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873815023] [2021-05-06 08:41:37,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:41:37,546 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:41:37,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84031284] [2021-05-06 08:41:37,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:41:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:41:37,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:41:37,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:41:37,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:37,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:37,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:41:37,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:41:37,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873815023] [2021-05-06 08:41:37,684 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:41:37,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84031284] [2021-05-06 08:41:37,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84031284] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:41:37,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:41:37,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:41:37,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670283013] [2021-05-06 08:41:37,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:41:37,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:41:37,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:41:37,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:41:37,686 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:41:37,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:41:37,737 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 08:41:37,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:41:37,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:41:37,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:41:37,738 INFO L225 Difference]: With dead ends: 34 [2021-05-06 08:41:37,738 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:41:37,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:41:37,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:41:37,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 08:41:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:41:37,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-06 08:41:37,741 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-06 08:41:37,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:41:37,742 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-06 08:41:37,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:41:37,742 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-06 08:41:37,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:41:37,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:41:37,742 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:41:37,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:41:37,962 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:41:37,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:41:37,962 INFO L82 PathProgramCache]: Analyzing trace with hash -870943837, now seen corresponding path program 2 times [2021-05-06 08:41:37,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:41:37,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106529276] [2021-05-06 08:41:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:41:37,970 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:41:37,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894955214] [2021-05-06 08:41:37,970 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:41:38,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:41:38,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:41:38,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 08:41:38,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:41:38,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:38,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:38,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:41:38,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:41:38,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106529276] [2021-05-06 08:41:38,166 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:41:38,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894955214] [2021-05-06 08:41:38,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894955214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:41:38,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:41:38,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:41:38,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994485497] [2021-05-06 08:41:38,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:41:38,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:41:38,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:41:38,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:41:38,167 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:41:38,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:41:38,391 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-05-06 08:41:38,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:41:38,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 08:41:38,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:41:38,392 INFO L225 Difference]: With dead ends: 42 [2021-05-06 08:41:38,392 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 08:41:38,392 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:41:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 08:41:38,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 08:41:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:41:38,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-06 08:41:38,395 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-06 08:41:38,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:41:38,395 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-06 08:41:38,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:41:38,396 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-06 08:41:38,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:41:38,396 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:41:38,396 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:41:38,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:41:38,611 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:41:38,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:41:38,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2080181988, now seen corresponding path program 3 times [2021-05-06 08:41:38,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:41:38,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567734245] [2021-05-06 08:41:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:41:38,619 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:41:38,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357090992] [2021-05-06 08:41:38,619 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 [2021-05-06 08:41:38,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 08:41:38,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:41:38,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:41:38,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:41:38,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:38,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:38,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:38,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:38,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:41:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:41:38,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:41:38,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567734245] [2021-05-06 08:41:38,875 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:41:38,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357090992] [2021-05-06 08:41:38,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357090992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:41:38,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:41:38,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:41:38,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259657151] [2021-05-06 08:41:38,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:41:38,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:41:38,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:41:38,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:41:38,876 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)