/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:52:38,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:52:38,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:52:38,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 21:52:38,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 21:52:38,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 21:52:38,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 21:52:38,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 21:52:38,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 21:52:38,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 21:52:38,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 21:52:38,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 21:52:38,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 21:52:38,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 21:52:38,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 21:52:38,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 21:52:38,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 21:52:38,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 21:52:38,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 21:52:38,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 21:52:38,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 21:52:38,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 21:52:38,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 21:52:38,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 21:52:38,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 21:52:38,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:52:38,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:52:38,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:52:38,099 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:52:38,131 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:52:38,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:52:38,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:52:38,134 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:52:38,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:52:38,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:52:38,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:52:38,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:52:38,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:52:38,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:52:38,135 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:52:38,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:52:38,135 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:52:38,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:52:38,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:52:38,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:52:38,136 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:52:38,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:52:38,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:52:38,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:52:38,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:52:38,137 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:52:38,137 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:52:38,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:52:38,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:52:38,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:52:38,398 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:52:38,398 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:52:38,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound20.c [2021-05-02 21:52:38,451 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62b1a5d9a/0f6c027d1c3043a2a6fa877fa80dd325/FLAGf24dda740 [2021-05-02 21:52:38,814 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:52:38,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound20.c [2021-05-02 21:52:38,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62b1a5d9a/0f6c027d1c3043a2a6fa877fa80dd325/FLAGf24dda740 [2021-05-02 21:52:38,830 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62b1a5d9a/0f6c027d1c3043a2a6fa877fa80dd325 [2021-05-02 21:52:38,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:52:38,835 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:52:38,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:52:38,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:52:38,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:52:38,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:52:38" (1/1) ... [2021-05-02 21:52:38,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19d8c6b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:38, skipping insertion in model container [2021-05-02 21:52:38,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:52:38" (1/1) ... [2021-05-02 21:52:38,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:52:38,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:52:38,965 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound20.c[537,550] [2021-05-02 21:52:38,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:52:38,984 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:52:39,025 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound20.c[537,550] [2021-05-02 21:52:39,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:52:39,046 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:52:39,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:39 WrapperNode [2021-05-02 21:52:39,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:52:39,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:52:39,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:52:39,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:52:39,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:39" (1/1) ... [2021-05-02 21:52:39,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:39" (1/1) ... [2021-05-02 21:52:39,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:39" (1/1) ... [2021-05-02 21:52:39,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:39" (1/1) ... [2021-05-02 21:52:39,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:39" (1/1) ... [2021-05-02 21:52:39,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:39" (1/1) ... [2021-05-02 21:52:39,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:39" (1/1) ... [2021-05-02 21:52:39,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:52:39,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:52:39,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:52:39,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:52:39,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:39" (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 21:52:39,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:52:39,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:52:39,152 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:52:39,152 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:52:39,152 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:52:39,152 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:52:39,152 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:52:39,152 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:52:39,152 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:52:39,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:52:39,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 21:52:39,153 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:52:39,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:52:39,153 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:52:39,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:52:39,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:52:39,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:52:39,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:52:39,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:52:39,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:52:39,322 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:52:39,323 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 21:52:39,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:52:39 BoogieIcfgContainer [2021-05-02 21:52:39,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:52:39,324 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:52:39,324 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:52:39,325 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:52:39,326 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:52:39" (1/1) ... [2021-05-02 21:52:39,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:52:39 BasicIcfg [2021-05-02 21:52:39,337 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:52:39,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:52:39,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:52:39,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:52:39,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:52:38" (1/4) ... [2021-05-02 21:52:39,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21082532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:52:39, skipping insertion in model container [2021-05-02 21:52:39,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:52:39" (2/4) ... [2021-05-02 21:52:39,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21082532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:52:39, skipping insertion in model container [2021-05-02 21:52:39,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:52:39" (3/4) ... [2021-05-02 21:52:39,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21082532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:52:39, skipping insertion in model container [2021-05-02 21:52:39,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:52:39" (4/4) ... [2021-05-02 21:52:39,341 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound20.cJordan [2021-05-02 21:52:39,344 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:52:39,347 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:52:39,356 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:52:39,367 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:52:39,367 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:52:39,367 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:52:39,367 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:52:39,367 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:52:39,367 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:52:39,367 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:52:39,368 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:52:39,375 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:52:39,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 21:52:39,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:39,379 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:52:39,379 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:39,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:39,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2021-05-02 21:52:39,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:39,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479532579] [2021-05-02 21:52:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:39,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:52:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:39,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:52:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:39,541 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 21:52:39,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:39,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479532579] [2021-05-02 21:52:39,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479532579] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:52:39,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:52:39,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:52:39,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997300136] [2021-05-02 21:52:39,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:52:39,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:39,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:52:39,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:52:39,554 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 21:52:39,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:39,601 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-05-02 21:52:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:52:39,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 17 [2021-05-02 21:52:39,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:39,607 INFO L225 Difference]: With dead ends: 31 [2021-05-02 21:52:39,607 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 21:52:39,608 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:52:39,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 21:52:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 21:52:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:52:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 21:52:39,627 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-05-02 21:52:39,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:39,628 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 21:52:39,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 21:52:39,628 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 21:52:39,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 21:52:39,629 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:39,629 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 21:52:39,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:52:39,629 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:39,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:39,630 INFO L82 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2021-05-02 21:52:39,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:39,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899660786] [2021-05-02 21:52:39,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:39,644 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:39,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188777098] [2021-05-02 21:52:39,644 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 21:52:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:39,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 21:52:39,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:39,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:39,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:39,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:39,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:39,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:39,840 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 21:52:39,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:39,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899660786] [2021-05-02 21:52:39,841 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:39,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188777098] [2021-05-02 21:52:39,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188777098] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:52:39,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:52:39,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 21:52:39,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140174755] [2021-05-02 21:52:39,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 21:52:39,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:39,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 21:52:39,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:52:39,847 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 21:52:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:39,861 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-05-02 21:52:39,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 21:52:39,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 18 [2021-05-02 21:52:39,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:39,863 INFO L225 Difference]: With dead ends: 27 [2021-05-02 21:52:39,863 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 21:52:39,864 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:52:39,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 21:52:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 21:52:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:52:39,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 21:52:39,874 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-05-02 21:52:39,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:39,875 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 21:52:39,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 21:52:39,875 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 21:52:39,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 21:52:39,878 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:39,878 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 21:52:40,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 21:52:40,093 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:40,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:40,097 INFO L82 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2021-05-02 21:52:40,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:40,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739093854] [2021-05-02 21:52:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:40,107 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:40,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869931447] [2021-05-02 21:52:40,107 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 21:52:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:40,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 21:52:40,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:40,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:40,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:40,226 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 21:52:40,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:40,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739093854] [2021-05-02 21:52:40,226 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:40,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869931447] [2021-05-02 21:52:40,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869931447] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:52:40,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:52:40,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 21:52:40,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121259468] [2021-05-02 21:52:40,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:52:40,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:40,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:52:40,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:52:40,228 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 21:52:40,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:40,288 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-02 21:52:40,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:52:40,288 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 21:52:40,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:40,289 INFO L225 Difference]: With dead ends: 35 [2021-05-02 21:52:40,289 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 21:52:40,289 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:52:40,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 21:52:40,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-02 21:52:40,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:52:40,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 21:52:40,295 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 18 [2021-05-02 21:52:40,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:40,296 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 21:52:40,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 21:52:40,296 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 21:52:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:52:40,297 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:40,297 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:52:40,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:40,513 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:40,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:40,513 INFO L82 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2021-05-02 21:52:40,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:40,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170670183] [2021-05-02 21:52:40,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:40,539 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:40,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793954257] [2021-05-02 21:52:40,539 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 21:52:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:40,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 21:52:40,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:40,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:40,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:40,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:40,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:40,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:40,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:40,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:40,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:52:40,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:40,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170670183] [2021-05-02 21:52:40,731 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:40,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793954257] [2021-05-02 21:52:40,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793954257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:52:40,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:52:40,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 21:52:40,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174830120] [2021-05-02 21:52:40,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 21:52:40,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:40,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 21:52:40,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 21:52:40,733 INFO L87 Difference]: Start difference. First operand 33 states and 36 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, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:52:40,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:40,754 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-05-02 21:52:40,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 21:52:40,755 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, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 21:52:40,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:40,755 INFO L225 Difference]: With dead ends: 37 [2021-05-02 21:52:40,756 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 21:52:40,756 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:52:40,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 21:52:40,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 21:52:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:52:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-05-02 21:52:40,759 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2021-05-02 21:52:40,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:40,759 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-05-02 21:52:40,759 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, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:52:40,759 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-05-02 21:52:40,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:52:40,760 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:40,760 INFO L523 BasicCegarLoop]: trace histogram [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 21:52:40,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:40,973 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:40,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:40,974 INFO L82 PathProgramCache]: Analyzing trace with hash 920647414, now seen corresponding path program 1 times [2021-05-02 21:52:40,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:40,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710903496] [2021-05-02 21:52:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:40,982 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:40,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732096184] [2021-05-02 21:52:40,982 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 21:52:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:41,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 21:52:41,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:41,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:52:41,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:41,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710903496] [2021-05-02 21:52:41,325 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:41,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732096184] [2021-05-02 21:52:41,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732096184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:52:41,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:52:41,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 21:52:41,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923753637] [2021-05-02 21:52:41,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 21:52:41,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:41,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 21:52:41,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:52:41,326 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:52:43,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:43,562 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-05-02 21:52:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 21:52:43,563 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 21:52:43,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:43,563 INFO L225 Difference]: With dead ends: 49 [2021-05-02 21:52:43,563 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 21:52:43,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 21:52:43,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 21:52:43,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-05-02 21:52:43,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:52:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-05-02 21:52:43,567 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 28 [2021-05-02 21:52:43,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:43,567 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-05-02 21:52:43,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:52:43,567 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-05-02 21:52:43,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:52:43,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:43,568 INFO L523 BasicCegarLoop]: trace histogram [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 21:52:43,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:43,786 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:43,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:43,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1631509547, now seen corresponding path program 1 times [2021-05-02 21:52:43,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:43,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026782] [2021-05-02 21:52:43,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:43,794 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:43,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127836649] [2021-05-02 21:52:43,795 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 21:52:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:43,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 21:52:43,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:43,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:43,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:43,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:43,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:43,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:43,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:43,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:43,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:43,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:52:44,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:44,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026782] [2021-05-02 21:52:44,080 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:44,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127836649] [2021-05-02 21:52:44,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127836649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:52:44,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:52:44,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 21:52:44,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506517651] [2021-05-02 21:52:44,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 21:52:44,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:44,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 21:52:44,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:52:44,082 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:52:44,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:44,160 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-05-02 21:52:44,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 21:52:44,160 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 21:52:44,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:44,162 INFO L225 Difference]: With dead ends: 53 [2021-05-02 21:52:44,162 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 21:52:44,162 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:52:44,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 21:52:44,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-05-02 21:52:44,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 21:52:44,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-05-02 21:52:44,166 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2021-05-02 21:52:44,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:44,166 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-05-02 21:52:44,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:52:44,166 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-05-02 21:52:44,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 21:52:44,167 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:44,167 INFO L523 BasicCegarLoop]: trace histogram [3, 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 21:52:44,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:44,385 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:44,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:44,386 INFO L82 PathProgramCache]: Analyzing trace with hash -357510123, now seen corresponding path program 1 times [2021-05-02 21:52:44,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:44,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431473285] [2021-05-02 21:52:44,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:44,394 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:44,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721883611] [2021-05-02 21:52:44,394 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 21:52:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:44,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 21:52:44,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:44,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 21:52:44,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:44,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431473285] [2021-05-02 21:52:44,652 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:44,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721883611] [2021-05-02 21:52:44,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721883611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:52:44,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:52:44,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 21:52:44,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036651595] [2021-05-02 21:52:44,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 21:52:44,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:44,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 21:52:44,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 21:52:44,654 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:52:46,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:46,835 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-05-02 21:52:46,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 21:52:46,835 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 21:52:46,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:46,836 INFO L225 Difference]: With dead ends: 57 [2021-05-02 21:52:46,836 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 21:52:46,837 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-02 21:52:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 21:52:46,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-05-02 21:52:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:52:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-02 21:52:46,840 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-02 21:52:46,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:46,840 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-02 21:52:46,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:52:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-02 21:52:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 21:52:46,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:46,841 INFO L523 BasicCegarLoop]: trace histogram [3, 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] [2021-05-02 21:52:47,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:47,055 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:47,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:47,056 INFO L82 PathProgramCache]: Analyzing trace with hash -782932132, now seen corresponding path program 2 times [2021-05-02 21:52:47,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:47,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445350998] [2021-05-02 21:52:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:47,063 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:47,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658502850] [2021-05-02 21:52:47,063 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 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 21:52:47,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:52:47,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:52:47,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 21:52:47,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:47,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:47,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:47,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:47,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:47,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:47,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:47,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:47,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:47,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:47,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:47,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:52:47,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:47,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445350998] [2021-05-02 21:52:47,203 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:47,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658502850] [2021-05-02 21:52:47,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658502850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:52:47,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:52:47,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 21:52:47,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42002422] [2021-05-02 21:52:47,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 21:52:47,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:47,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 21:52:47,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:52:47,205 INFO L87 Difference]: Start difference. First operand 42 states and 45 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, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:52:47,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:47,238 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-02 21:52:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:52:47,239 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, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2021-05-02 21:52:47,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:47,239 INFO L225 Difference]: With dead ends: 47 [2021-05-02 21:52:47,239 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 21:52:47,240 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:52:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 21:52:47,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 21:52:47,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:52:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-02 21:52:47,242 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2021-05-02 21:52:47,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:47,242 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-02 21:52:47,242 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, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:52:47,242 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-02 21:52:47,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 21:52:47,243 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:47,243 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:52:47,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:47,459 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:47,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:47,460 INFO L82 PathProgramCache]: Analyzing trace with hash -781829865, now seen corresponding path program 2 times [2021-05-02 21:52:47,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:47,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309282180] [2021-05-02 21:52:47,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:47,469 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:47,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198038694] [2021-05-02 21:52:47,469 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 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 21:52:47,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:52:47,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:52:47,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 21:52:47,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:47,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:47,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:47,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:47,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:47,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:47,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:53,730 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 21:53:01,826 WARN L205 SmtUtils]: Spent 6.03 s on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 21:53:13,974 WARN L205 SmtUtils]: Spent 12.08 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 21:53:22,103 WARN L205 SmtUtils]: Spent 8.06 s on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-05-02 21:53:22,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:53:22,249 WARN L159 QuantifierPusher]: Ignoring assumption.