/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/hard-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:52:41,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:52:41,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:52:41,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:52:41,047 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:52:41,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:52:41,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:52:41,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:52:41,059 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:52:41,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:52:41,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:52:41,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:52:41,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:52:41,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:52:41,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:52:41,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:52:41,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:52:41,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:52:41,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:52:41,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:52:41,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:52:41,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:52:41,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:52:41,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:52:41,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:52:41,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:52:41,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:52:41,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:52:41,101 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:52:41,113 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:52:41,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:52:41,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:52:41,114 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:52:41,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:52:41,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:52:41,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:52:41,115 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:52:41,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:52:41,115 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:52:41,115 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:52:41,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:52:41,115 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:52:41,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:52:41,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:52:41,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:52:41,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:52:41,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:52:41,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:52:41,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:52:41,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:52:41,119 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:52:41,119 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:52:41,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:52:41,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:52:41,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:52:41,491 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:52:41,492 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:52:41,492 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound50.c [2021-05-02 20:52:41,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71c635663/08b09946ef494babb2169bfcc7d5ee3a/FLAG1c22e7367 [2021-05-02 20:52:41,987 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:52:41,988 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound50.c [2021-05-02 20:52:41,994 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71c635663/08b09946ef494babb2169bfcc7d5ee3a/FLAG1c22e7367 [2021-05-02 20:52:42,012 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71c635663/08b09946ef494babb2169bfcc7d5ee3a [2021-05-02 20:52:42,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:52:42,020 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:52:42,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:52:42,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:52:42,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:52:42,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:52:42" (1/1) ... [2021-05-02 20:52:42,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5325051e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:42, skipping insertion in model container [2021-05-02 20:52:42,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:52:42" (1/1) ... [2021-05-02 20:52:42,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:52:42,047 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:52:42,189 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/hard-ll_unwindbound50.c[546,559] [2021-05-02 20:52:42,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:52:42,220 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:52:42,264 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/hard-ll_unwindbound50.c[546,559] [2021-05-02 20:52:42,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:52:42,297 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:52:42,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:42 WrapperNode [2021-05-02 20:52:42,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:52:42,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:52:42,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:52:42,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:52:42,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:42" (1/1) ... [2021-05-02 20:52:42,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:42" (1/1) ... [2021-05-02 20:52:42,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:42" (1/1) ... [2021-05-02 20:52:42,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:42" (1/1) ... [2021-05-02 20:52:42,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:42" (1/1) ... [2021-05-02 20:52:42,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:42" (1/1) ... [2021-05-02 20:52:42,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:42" (1/1) ... [2021-05-02 20:52:42,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:52:42,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:52:42,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:52:42,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:52:42,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:52:42,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:52:42,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:52:42,428 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:52:42,428 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:52:42,428 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:52:42,428 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:52:42,428 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:52:42,429 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:52:42,429 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:52:42,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:52:42,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:52:42,430 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:52:42,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:52:42,430 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:52:42,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:52:42,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:52:42,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:52:42,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:52:42,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:52:42,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:52:42,719 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:52:42,720 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:52:42,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:42 BoogieIcfgContainer [2021-05-02 20:52:42,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:52:42,722 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:52:42,722 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:52:42,722 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:52:42,729 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:42" (1/1) ... [2021-05-02 20:52:42,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:52:42 BasicIcfg [2021-05-02 20:52:42,751 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:52:42,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:52:42,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:52:42,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:52:42,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:52:42" (1/4) ... [2021-05-02 20:52:42,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78de8a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:52:42, skipping insertion in model container [2021-05-02 20:52:42,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:42" (2/4) ... [2021-05-02 20:52:42,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78de8a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:52:42, skipping insertion in model container [2021-05-02 20:52:42,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:42" (3/4) ... [2021-05-02 20:52:42,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78de8a74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:52:42, skipping insertion in model container [2021-05-02 20:52:42,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:52:42" (4/4) ... [2021-05-02 20:52:42,757 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound50.cJordan [2021-05-02 20:52:42,762 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:52:42,765 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:52:42,781 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:52:42,795 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:52:42,795 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:52:42,795 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:52:42,795 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:52:42,796 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:52:42,796 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:52:42,796 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:52:42,796 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:52:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:52:42,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:52:42,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:42,813 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:42,813 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:42,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:42,818 INFO L82 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2021-05-02 20:52:42,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:42,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045512815] [2021-05-02 20:52:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:43,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:43,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:43,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:52:43,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:43,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045512815] [2021-05-02 20:52:43,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045512815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:43,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:43,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:52:43,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771842966] [2021-05-02 20:52:43,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:52:43,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:43,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:52:43,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:52:43,139 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:52:43,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:43,307 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 20:52:43,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:52:43,309 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 20:52:43,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:43,315 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:52:43,315 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:52:43,316 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:52:43,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:52:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 20:52:43,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:52:43,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 20:52:43,364 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-02 20:52:43,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:43,364 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 20:52:43,364 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:52:43,364 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 20:52:43,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:52:43,365 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:43,366 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:43,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:52:43,366 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:43,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:43,368 INFO L82 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2021-05-02 20:52:43,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:43,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274180053] [2021-05-02 20:52:43,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:43,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:43,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:52:43,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:43,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274180053] [2021-05-02 20:52:43,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274180053] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:43,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:43,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:52:43,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101714622] [2021-05-02 20:52:43,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:43,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:43,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:43,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:43,490 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:52:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:43,741 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2021-05-02 20:52:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:43,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 20:52:43,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:43,744 INFO L225 Difference]: With dead ends: 45 [2021-05-02 20:52:43,744 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 20:52:43,744 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:43,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 20:52:43,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-02 20:52:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:52:43,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 20:52:43,752 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-02 20:52:43,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:43,752 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 20:52:43,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:52:43,753 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 20:52:43,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 20:52:43,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:43,754 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:43,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:52:43,754 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:43,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:43,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2021-05-02 20:52:43,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:43,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440701935] [2021-05-02 20:52:43,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:43,767 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:43,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135974388] [2021-05-02 20:52:43,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:43,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:52:43,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:43,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:52:43,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:43,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440701935] [2021-05-02 20:52:43,970 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:43,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135974388] [2021-05-02 20:52:43,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135974388] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:43,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:43,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:52:43,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531446184] [2021-05-02 20:52:43,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:52:43,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:43,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:52:43,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:52:43,971 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:52:43,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:43,982 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-05-02 20:52:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:52:43,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 20:52:43,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:43,984 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:52:43,984 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 20:52:43,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:52:43,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 20:52:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 20:52:43,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:52:43,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-02 20:52:43,989 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-02 20:52:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:43,989 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-02 20:52:43,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:52:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-02 20:52:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:52:43,990 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:43,990 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:44,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 20:52:44,212 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:44,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:44,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2021-05-02 20:52:44,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:44,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493345197] [2021-05-02 20:52:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 20:52:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:52:44,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:44,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493345197] [2021-05-02 20:52:44,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493345197] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:44,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:44,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:52:44,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030281598] [2021-05-02 20:52:44,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:44,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:44,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:44,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:44,331 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:52:44,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:44,615 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-05-02 20:52:44,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:44,615 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:52:44,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:44,618 INFO L225 Difference]: With dead ends: 50 [2021-05-02 20:52:44,618 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 20:52:44,619 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 169.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:44,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 20:52:44,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-02 20:52:44,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:52:44,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 20:52:44,633 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-02 20:52:44,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:44,633 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 20:52:44,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:52:44,633 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 20:52:44,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:52:44,634 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:44,634 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:44,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 20:52:44,635 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:44,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:44,636 INFO L82 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2021-05-02 20:52:44,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:44,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127203475] [2021-05-02 20:52:44,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:44,659 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:44,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869563308] [2021-05-02 20:52:44,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:52:44,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:52:44,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:44,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127203475] [2021-05-02 20:52:44,896 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:44,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869563308] [2021-05-02 20:52:44,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869563308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:44,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:44,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:52:44,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981710830] [2021-05-02 20:52:44,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:52:44,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:44,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:52:44,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:52:44,897 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:52:45,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:45,039 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-05-02 20:52:45,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:45,039 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-02 20:52:45,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:45,040 INFO L225 Difference]: With dead ends: 61 [2021-05-02 20:52:45,040 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:52:45,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:45,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:52:45,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 20:52:45,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:52:45,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2021-05-02 20:52:45,049 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 28 [2021-05-02 20:52:45,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:45,049 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2021-05-02 20:52:45,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:52:45,049 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2021-05-02 20:52:45,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:52:45,050 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:45,050 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:45,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:45,251 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:45,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:45,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2021-05-02 20:52:45,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:45,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556872396] [2021-05-02 20:52:45,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:45,259 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:45,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162210874] [2021-05-02 20:52:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:45,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:52:45,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:45,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:45,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:45,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556872396] [2021-05-02 20:52:45,466 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:45,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162210874] [2021-05-02 20:52:45,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162210874] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:45,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:45,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:52:45,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054085149] [2021-05-02 20:52:45,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:52:45,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:45,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:52:45,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:52:45,468 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:52:45,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:45,504 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-02 20:52:45,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:52:45,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 20:52:45,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:45,506 INFO L225 Difference]: With dead ends: 69 [2021-05-02 20:52:45,506 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 20:52:45,507 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:52:45,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 20:52:45,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-02 20:52:45,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:52:45,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-02 20:52:45,526 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-02 20:52:45,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:45,526 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-02 20:52:45,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:52:45,526 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-02 20:52:45,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:52:45,527 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:45,527 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:45,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:45,749 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:45,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:45,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2021-05-02 20:52:45,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:45,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841444154] [2021-05-02 20:52:45,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:45,757 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:45,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862280690] [2021-05-02 20:52:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:45,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:52:45,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:45,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:45,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:46,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:46,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841444154] [2021-05-02 20:52:46,022 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:46,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862280690] [2021-05-02 20:52:46,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862280690] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:46,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:46,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:52:46,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6701010] [2021-05-02 20:52:46,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:52:46,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:46,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:52:46,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:52:46,024 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-05-02 20:52:46,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:46,158 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-05-02 20:52:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:52:46,158 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 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 36 [2021-05-02 20:52:46,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:46,159 INFO L225 Difference]: With dead ends: 72 [2021-05-02 20:52:46,159 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:52:46,159 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:52:46,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:52:46,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 20:52:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:52:46,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 20:52:46,163 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-02 20:52:46,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:46,164 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 20:52:46,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2021-05-02 20:52:46,164 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 20:52:46,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:52:46,165 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:46,165 INFO L523 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1] [2021-05-02 20:52:46,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:46,381 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:46,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2021-05-02 20:52:46,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:46,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324398104] [2021-05-02 20:52:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:46,389 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:46,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992589282] [2021-05-02 20:52:46,392 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 [2021-05-02 20:52:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:46,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:52:46,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:46,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:46,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:46,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324398104] [2021-05-02 20:52:46,569 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:46,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992589282] [2021-05-02 20:52:46,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992589282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:46,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:46,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:52:46,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158096513] [2021-05-02 20:52:46,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:52:46,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:46,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:52:46,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:52:46,570 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:52:46,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:46,612 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-05-02 20:52:46,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:52:46,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-02 20:52:46,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:46,618 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:52:46,618 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:52:46,618 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:52:46,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 20:52:46,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:52:46,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-02 20:52:46,627 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-02 20:52:46,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:46,628 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-02 20:52:46,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:52:46,628 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-02 20:52:46,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 20:52:46,630 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:46,630 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:46,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:46,833 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:46,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:46,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2021-05-02 20:52:46,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:46,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261952059] [2021-05-02 20:52:46,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:46,840 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:46,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536197539] [2021-05-02 20:52:46,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:46,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:52:46,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:46,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:46,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:52:47,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:47,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261952059] [2021-05-02 20:52:47,121 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:47,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536197539] [2021-05-02 20:52:47,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536197539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:47,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:47,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:52:47,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630282384] [2021-05-02 20:52:47,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:52:47,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:47,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:52:47,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:52:47,122 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:52:47,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:47,378 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2021-05-02 20:52:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:52:47,379 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2021-05-02 20:52:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:47,380 INFO L225 Difference]: With dead ends: 87 [2021-05-02 20:52:47,380 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 20:52:47,380 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:52:47,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 20:52:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-05-02 20:52:47,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 54 states have internal predecessors, (62), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 20:52:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2021-05-02 20:52:47,385 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 46 [2021-05-02 20:52:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:47,385 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2021-05-02 20:52:47,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:52:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2021-05-02 20:52:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:52:47,387 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:47,387 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:47,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:47,601 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:47,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:47,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2021-05-02 20:52:47,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:47,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055956631] [2021-05-02 20:52:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:47,607 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:47,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683720268] [2021-05-02 20:52:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:47,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:52:47,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:47,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:52:47,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:47,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055956631] [2021-05-02 20:52:47,812 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:47,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683720268] [2021-05-02 20:52:47,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683720268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:47,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:47,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:52:47,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858211853] [2021-05-02 20:52:47,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:47,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:47,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:47,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:47,816 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:52:47,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:47,854 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2021-05-02 20:52:47,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:52:47,855 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2021-05-02 20:52:47,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:47,856 INFO L225 Difference]: With dead ends: 93 [2021-05-02 20:52:47,856 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 20:52:47,856 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:47,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 20:52:47,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 20:52:47,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 60 states have internal predecessors, (67), 21 states have call successors, (21), 13 states have call predecessors, (21), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 20:52:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-05-02 20:52:47,861 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 54 [2021-05-02 20:52:47,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:47,861 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-05-02 20:52:47,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:52:47,861 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-05-02 20:52:47,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:52:47,862 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:47,862 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:48,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 20:52:48,084 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:48,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:48,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1448522011, now seen corresponding path program 1 times [2021-05-02 20:52:48,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:48,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240742449] [2021-05-02 20:52:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:48,092 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:48,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709968726] [2021-05-02 20:52:48,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:48,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:52:48,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:48,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 20:52:48,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:48,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240742449] [2021-05-02 20:52:48,488 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:48,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709968726] [2021-05-02 20:52:48,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709968726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:48,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:48,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:52:48,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108708736] [2021-05-02 20:52:48,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:52:48,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:48,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:52:48,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:48,490 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:52:48,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:48,742 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2021-05-02 20:52:48,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:52:48,743 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-02 20:52:48,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:48,744 INFO L225 Difference]: With dead ends: 96 [2021-05-02 20:52:48,744 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 20:52:48,744 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:52:48,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 20:52:48,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-05-02 20:52:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 59 states have internal predecessors, (65), 18 states have call successors, (18), 14 states have call predecessors, (18), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 20:52:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-05-02 20:52:48,748 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 54 [2021-05-02 20:52:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:48,748 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-05-02 20:52:48,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:52:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-05-02 20:52:48,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 20:52:48,749 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:48,749 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:48,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 20:52:48,950 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:48,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:48,951 INFO L82 PathProgramCache]: Analyzing trace with hash -161321978, now seen corresponding path program 2 times [2021-05-02 20:52:48,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:48,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482412313] [2021-05-02 20:52:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:48,957 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:48,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48428931] [2021-05-02 20:52:48,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:49,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-05-02 20:52:49,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:49,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:52:49,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:49,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,127 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 20:52:49,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:49,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482412313] [2021-05-02 20:52:49,128 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:49,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48428931] [2021-05-02 20:52:49,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48428931] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:49,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:49,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 20:52:49,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847934310] [2021-05-02 20:52:49,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:52:49,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:49,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:52:49,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:52:49,129 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:52:49,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:49,206 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2021-05-02 20:52:49,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:49,206 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2021-05-02 20:52:49,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:49,207 INFO L225 Difference]: With dead ends: 102 [2021-05-02 20:52:49,207 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 20:52:49,207 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:52:49,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 20:52:49,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-02 20:52:49,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 67 states have internal predecessors, (75), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:52:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2021-05-02 20:52:49,211 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 56 [2021-05-02 20:52:49,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:49,212 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2021-05-02 20:52:49,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:52:49,212 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2021-05-02 20:52:49,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:52:49,213 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:49,213 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:49,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:49,429 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:49,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:49,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1294763379, now seen corresponding path program 1 times [2021-05-02 20:52:49,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:49,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200796178] [2021-05-02 20:52:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:49,436 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:49,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339430902] [2021-05-02 20:52:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:49,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:52:49,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:49,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-02 20:52:49,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:49,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200796178] [2021-05-02 20:52:49,619 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:49,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339430902] [2021-05-02 20:52:49,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339430902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:49,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:49,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:52:49,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83157151] [2021-05-02 20:52:49,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:49,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:49,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:49,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:49,620 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:52:49,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:49,671 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2021-05-02 20:52:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:49,671 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2021-05-02 20:52:49,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:49,673 INFO L225 Difference]: With dead ends: 103 [2021-05-02 20:52:49,673 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 20:52:49,673 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:52:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 20:52:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-02 20:52:49,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 69 states have internal predecessors, (77), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:52:49,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2021-05-02 20:52:49,678 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 61 [2021-05-02 20:52:49,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:49,678 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2021-05-02 20:52:49,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:52:49,678 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2021-05-02 20:52:49,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 20:52:49,679 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:49,679 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:49,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:49,893 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:49,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:49,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1774996485, now seen corresponding path program 2 times [2021-05-02 20:52:49,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:49,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864811497] [2021-05-02 20:52:49,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:49,900 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:49,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7952887] [2021-05-02 20:52:49,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:50,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:52:50,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:50,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 20:52:50,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:50,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 43 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 20:52:50,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:50,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864811497] [2021-05-02 20:52:50,312 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:50,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7952887] [2021-05-02 20:52:50,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7952887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:50,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:50,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:52:50,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287592304] [2021-05-02 20:52:50,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:52:50,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:50,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:52:50,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:52:50,313 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:52:50,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:50,695 INFO L93 Difference]: Finished difference Result 138 states and 168 transitions. [2021-05-02 20:52:50,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:52:50,696 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 64 [2021-05-02 20:52:50,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:50,698 INFO L225 Difference]: With dead ends: 138 [2021-05-02 20:52:50,698 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 20:52:50,699 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:52:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 20:52:50,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2021-05-02 20:52:50,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.175) internal successors, (94), 83 states have internal predecessors, (94), 28 states have call successors, (28), 17 states have call predecessors, (28), 16 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 20:52:50,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2021-05-02 20:52:50,707 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 64 [2021-05-02 20:52:50,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:50,707 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2021-05-02 20:52:50,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:52:50,708 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2021-05-02 20:52:50,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 20:52:50,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:50,708 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:50,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:52:50,932 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:50,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:50,932 INFO L82 PathProgramCache]: Analyzing trace with hash 112143503, now seen corresponding path program 1 times [2021-05-02 20:52:50,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:50,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939605695] [2021-05-02 20:52:50,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:50,943 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:50,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794675870] [2021-05-02 20:52:50,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:51,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:52:51,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:51,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:52:51,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:51,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939605695] [2021-05-02 20:52:51,142 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:51,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794675870] [2021-05-02 20:52:51,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794675870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:51,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:51,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:52:51,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424150691] [2021-05-02 20:52:51,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:52:51,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:51,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:52:51,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:52:51,143 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:52:51,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:51,226 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2021-05-02 20:52:51,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:51,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2021-05-02 20:52:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:51,228 INFO L225 Difference]: With dead ends: 138 [2021-05-02 20:52:51,228 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 20:52:51,228 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:52:51,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 20:52:51,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-05-02 20:52:51,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 92 states have internal predecessors, (103), 28 states have call successors, (28), 19 states have call predecessors, (28), 18 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 20:52:51,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2021-05-02 20:52:51,233 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 68 [2021-05-02 20:52:51,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:51,233 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2021-05-02 20:52:51,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:52:51,233 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2021-05-02 20:52:51,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 20:52:51,234 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:51,234 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:51,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 20:52:51,441 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:51,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:51,441 INFO L82 PathProgramCache]: Analyzing trace with hash 113245770, now seen corresponding path program 1 times [2021-05-02 20:52:51,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:51,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860652816] [2021-05-02 20:52:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:51,447 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:51,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104239123] [2021-05-02 20:52:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:51,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:52:51,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:51,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-02 20:52:51,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:51,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860652816] [2021-05-02 20:52:51,915 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:51,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104239123] [2021-05-02 20:52:51,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104239123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:51,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:51,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:52:51,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95577430] [2021-05-02 20:52:51,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:52:51,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:51,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:52:51,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:52:51,916 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:52:52,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:52,144 INFO L93 Difference]: Finished difference Result 149 states and 174 transitions. [2021-05-02 20:52:52,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:52:52,145 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2021-05-02 20:52:52,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:52,146 INFO L225 Difference]: With dead ends: 149 [2021-05-02 20:52:52,146 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 20:52:52,146 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:52:52,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 20:52:52,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-02 20:52:52,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 99 states have internal predecessors, (113), 30 states have call successors, (30), 20 states have call predecessors, (30), 19 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 20:52:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2021-05-02 20:52:52,156 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 68 [2021-05-02 20:52:52,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:52,156 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2021-05-02 20:52:52,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 20:52:52,156 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2021-05-02 20:52:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 20:52:52,157 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:52,157 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:52,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:52:52,373 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:52,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:52,373 INFO L82 PathProgramCache]: Analyzing trace with hash -2039825082, now seen corresponding path program 2 times [2021-05-02 20:52:52,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:52,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176681018] [2021-05-02 20:52:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:52,381 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:52,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303208661] [2021-05-02 20:52:52,381 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:52,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:52:52,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:52,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:52:52,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:52,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:52,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:52,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:52,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:52,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:52,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:52,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:52,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:52,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:52,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:52,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:52,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:52,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:52,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:52,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 46 proven. 24 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-05-02 20:52:52,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:52,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176681018] [2021-05-02 20:52:52,887 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:52,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303208661] [2021-05-02 20:52:52,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303208661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:52,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:52,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:52:52,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191503927] [2021-05-02 20:52:52,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:52:52,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:52,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:52:52,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:52:52,890 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 20:52:53,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:53,169 INFO L93 Difference]: Finished difference Result 150 states and 171 transitions. [2021-05-02 20:52:53,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:52:53,170 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 73 [2021-05-02 20:52:53,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:53,170 INFO L225 Difference]: With dead ends: 150 [2021-05-02 20:52:53,170 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 20:52:53,171 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 177.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:52:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 20:52:53,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-02 20:52:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 97 states have (on average 1.134020618556701) internal successors, (110), 100 states have internal predecessors, (110), 31 states have call successors, (31), 21 states have call predecessors, (31), 20 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 20:52:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 169 transitions. [2021-05-02 20:52:53,175 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 169 transitions. Word has length 73 [2021-05-02 20:52:53,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:53,176 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 169 transitions. [2021-05-02 20:52:53,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 20:52:53,176 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 169 transitions. [2021-05-02 20:52:53,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:52:53,177 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:53,177 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:53,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:53,389 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:53,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:53,389 INFO L82 PathProgramCache]: Analyzing trace with hash -742748636, now seen corresponding path program 1 times [2021-05-02 20:52:53,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:53,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805069917] [2021-05-02 20:52:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:53,396 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:53,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797456670] [2021-05-02 20:52:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:53,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:52:53,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:53,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:53,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:54,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:54,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:54,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:54,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:54,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:54,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:54,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,016 WARN L205 SmtUtils]: Spent 6.77 s on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2021-05-02 20:53:01,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,437 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-05-02 20:53:01,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:01,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:02,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:53:03,402 WARN L159 QuantifierPusher]: Ignoring assumption.