/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/egcd2-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:31:57,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:31:57,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:31:57,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:31:57,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:31:57,293 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:31:57,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:31:57,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:31:57,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:31:57,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:31:57,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:31:57,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:31:57,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:31:57,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:31:57,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:31:57,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:31:57,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:31:57,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:31:57,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:31:57,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:31:57,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:31:57,313 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:31:57,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:31:57,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:31:57,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:31:57,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:31:57,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:31:57,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:31:57,328 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:31:57,341 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:31:57,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:31:57,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:31:57,343 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:31:57,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:31:57,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:31:57,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:31:57,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:31:57,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:31:57,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:31:57,344 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:31:57,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:31:57,344 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:31:57,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:31:57,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:31:57,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:31:57,345 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:31:57,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:31:57,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:31:57,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:31:57,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:31:57,346 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:31:57,346 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:31:57,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:31:57,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:31:57,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:31:57,615 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:31:57,616 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:31:57,616 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c [2021-05-02 20:31:57,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c65cd669/38797b3954f24408ae151e587b41ca9d/FLAGf695efa06 [2021-05-02 20:31:57,994 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:31:57,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound50.c [2021-05-02 20:31:58,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c65cd669/38797b3954f24408ae151e587b41ca9d/FLAGf695efa06 [2021-05-02 20:31:58,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c65cd669/38797b3954f24408ae151e587b41ca9d [2021-05-02 20:31:58,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:31:58,414 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:31:58,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:31:58,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:31:58,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:31:58,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:31:58" (1/1) ... [2021-05-02 20:31:58,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72998653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:31:58, skipping insertion in model container [2021-05-02 20:31:58,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:31:58" (1/1) ... [2021-05-02 20:31:58,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:31:58,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:31:58,547 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/egcd2-ll_valuebound50.c[490,503] [2021-05-02 20:31:58,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:31:58,564 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:31:58,571 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/egcd2-ll_valuebound50.c[490,503] [2021-05-02 20:31:58,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:31:58,585 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:31:58,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:31:58 WrapperNode [2021-05-02 20:31:58,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:31:58,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:31:58,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:31:58,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:31:58,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:31:58" (1/1) ... [2021-05-02 20:31:58,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:31:58" (1/1) ... [2021-05-02 20:31:58,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:31:58" (1/1) ... [2021-05-02 20:31:58,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:31:58" (1/1) ... [2021-05-02 20:31:58,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:31:58" (1/1) ... [2021-05-02 20:31:58,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:31:58" (1/1) ... [2021-05-02 20:31:58,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:31:58" (1/1) ... [2021-05-02 20:31:58,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:31:58,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:31:58,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:31:58,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:31:58,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:31:58" (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 20:31:58,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:31:58,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:31:58,710 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:31:58,710 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:31:58,710 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:31:58,710 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:31:58,710 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:31:58,711 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:31:58,711 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:31:58,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:31:58,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:31:58,711 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:31:58,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:31:58,712 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:31:58,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:31:58,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:31:58,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:31:58,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:31:58,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:31:58,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:31:58,972 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:31:58,972 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:31:58,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:31:58 BoogieIcfgContainer [2021-05-02 20:31:58,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:31:58,974 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:31:58,974 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:31:58,974 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:31:58,976 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:31:58" (1/1) ... [2021-05-02 20:31:58,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:31:58 BasicIcfg [2021-05-02 20:31:58,988 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:31:58,989 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:31:58,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:31:58,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:31:58,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:31:58" (1/4) ... [2021-05-02 20:31:58,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efab89d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:31:58, skipping insertion in model container [2021-05-02 20:31:58,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:31:58" (2/4) ... [2021-05-02 20:31:58,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efab89d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:31:58, skipping insertion in model container [2021-05-02 20:31:58,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:31:58" (3/4) ... [2021-05-02 20:31:58,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efab89d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:31:58, skipping insertion in model container [2021-05-02 20:31:58,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:31:58" (4/4) ... [2021-05-02 20:31:58,993 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound50.cJordan [2021-05-02 20:31:58,997 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:31:58,999 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:31:59,011 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:31:59,030 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:31:59,030 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:31:59,031 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:31:59,031 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:31:59,031 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:31:59,031 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:31:59,031 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:31:59,031 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:31:59,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 20:31:59,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:31:59,057 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:31:59,058 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 20:31:59,058 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:31:59,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:31:59,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2021-05-02 20:31:59,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:31:59,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626457508] [2021-05-02 20:31:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:31:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:31:59,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:31:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:31:59,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:31:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:31:59,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:31:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:31:59,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:31:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:31:59,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:31:59,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:31:59,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-02 20:31:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:31:59,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 20:31:59,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:31:59,331 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 20:31:59,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:31:59,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626457508] [2021-05-02 20:31:59,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626457508] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:31:59,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:31:59,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:31:59,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493917917] [2021-05-02 20:31:59,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:31:59,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:31:59,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:31:59,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:31:59,343 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:31:59,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:31:59,439 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-02 20:31:59,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:31:59,440 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-02 20:31:59,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:31:59,445 INFO L225 Difference]: With dead ends: 40 [2021-05-02 20:31:59,446 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:31:59,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:31:59,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:31:59,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:31:59,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 20:31:59,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-02 20:31:59,471 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-02 20:31:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:31:59,471 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-02 20:31:59,471 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:31:59,471 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-02 20:31:59,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 20:31:59,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:31:59,473 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 20:31:59,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:31:59,473 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:31:59,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:31:59,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2021-05-02 20:31:59,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:31:59,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389022354] [2021-05-02 20:31:59,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:31:59,486 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:31:59,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562430926] [2021-05-02 20:31:59,486 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 20:31:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:31:59,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:31:59,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:31:59,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:31:59,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:31:59,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:31:59,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:31:59,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:31:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 20:31:59,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:31:59,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389022354] [2021-05-02 20:31:59,757 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:31:59,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562430926] [2021-05-02 20:31:59,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562430926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:31:59,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:31:59,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:31:59,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378456046] [2021-05-02 20:31:59,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:31:59,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:31:59,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:31:59,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:31:59,775 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:31:59,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:31:59,840 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-05-02 20:31:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:31:59,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-05-02 20:31:59,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:31:59,841 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:31:59,841 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:31:59,842 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:31:59,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:31:59,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 20:31:59,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 20:31:59,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-02 20:31:59,847 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-02 20:31:59,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:31:59,848 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-02 20:31:59,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:31:59,848 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-02 20:31:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 20:31:59,849 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:31:59,849 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1] [2021-05-02 20:32:00,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:32:00,061 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:00,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:00,062 INFO L82 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2021-05-02 20:32:00,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:00,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152545992] [2021-05-02 20:32:00,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:00,076 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:00,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868489339] [2021-05-02 20:32:00,076 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 20:32:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:00,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:32:00,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:00,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:32:00,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:00,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152545992] [2021-05-02 20:32:00,261 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:00,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868489339] [2021-05-02 20:32:00,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868489339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:00,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:00,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:32:00,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107384507] [2021-05-02 20:32:00,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:32:00,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:00,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:32:00,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:32:00,263 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:32:00,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:00,399 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-05-02 20:32:00,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:32:00,400 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2021-05-02 20:32:00,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:00,403 INFO L225 Difference]: With dead ends: 55 [2021-05-02 20:32:00,403 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 20:32:00,404 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:32:00,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 20:32:00,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-02 20:32:00,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:32:00,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-02 20:32:00,421 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-02 20:32:00,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:00,422 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-02 20:32:00,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 20:32:00,422 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-02 20:32:00,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 20:32:00,424 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:00,424 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1] [2021-05-02 20:32:00,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:00,629 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:00,629 INFO L82 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2021-05-02 20:32:00,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:00,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483979072] [2021-05-02 20:32:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:00,638 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:00,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350923869] [2021-05-02 20:32:00,639 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 20:32:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:00,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:32:00,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:00,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:32:00,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:00,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483979072] [2021-05-02 20:32:00,897 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:00,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350923869] [2021-05-02 20:32:00,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350923869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:00,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:00,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:32:00,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548172811] [2021-05-02 20:32:00,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:32:00,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:00,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:32:00,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:32:00,898 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:32:01,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:01,008 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-02 20:32:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:32:01,009 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2021-05-02 20:32:01,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:01,014 INFO L225 Difference]: With dead ends: 54 [2021-05-02 20:32:01,014 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 20:32:01,016 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:32:01,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 20:32:01,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 20:32:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:32:01,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-02 20:32:01,021 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-02 20:32:01,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:01,021 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-02 20:32:01,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:32:01,021 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-02 20:32:01,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:32:01,022 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:01,022 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 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, 1, 1, 1, 1, 1] [2021-05-02 20:32:01,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:01,225 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:01,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:01,225 INFO L82 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2021-05-02 20:32:01,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:01,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580610688] [2021-05-02 20:32:01,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:01,234 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:01,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201683602] [2021-05-02 20:32:01,234 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 20:32:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:01,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:32:01,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:01,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 20:32:01,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:01,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580610688] [2021-05-02 20:32:01,443 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:01,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201683602] [2021-05-02 20:32:01,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201683602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:01,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:01,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:32:01,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013917094] [2021-05-02 20:32:01,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:32:01,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:01,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:32:01,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:32:01,444 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:32:01,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:01,541 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2021-05-02 20:32:01,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:32:01,541 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-02 20:32:01,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:01,542 INFO L225 Difference]: With dead ends: 58 [2021-05-02 20:32:01,542 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:32:01,542 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:32:01,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:32:01,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 20:32:01,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:32:01,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-02 20:32:01,546 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-02 20:32:01,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:01,546 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-02 20:32:01,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 20:32:01,547 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-02 20:32:01,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 20:32:01,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:01,547 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:01,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:01,765 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:01,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:01,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2021-05-02 20:32:01,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:01,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277239466] [2021-05-02 20:32:01,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:01,773 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:01,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168194387] [2021-05-02 20:32:01,774 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 20:32:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:01,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:32:01,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:01,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:01,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-05-02 20:32:02,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:02,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277239466] [2021-05-02 20:32:02,005 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:02,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168194387] [2021-05-02 20:32:02,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168194387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:02,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:02,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:32:02,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548461411] [2021-05-02 20:32:02,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:32:02,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:02,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:32:02,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:32:02,006 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:32:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:06,265 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-05-02 20:32:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:32:06,265 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 60 [2021-05-02 20:32:06,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:06,268 INFO L225 Difference]: With dead ends: 62 [2021-05-02 20:32:06,269 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 20:32:06,269 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:32:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 20:32:06,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 20:32:06,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:32:06,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-02 20:32:06,272 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-02 20:32:06,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:06,273 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-02 20:32:06,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 20:32:06,273 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-02 20:32:06,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 20:32:06,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:06,274 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:06,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:32:06,496 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:06,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:06,496 INFO L82 PathProgramCache]: Analyzing trace with hash 14033329, now seen corresponding path program 1 times [2021-05-02 20:32:06,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:06,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83057500] [2021-05-02 20:32:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:06,504 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:06,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [238247431] [2021-05-02 20:32:06,505 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 20:32:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:06,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:32:06,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:06,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 20:32:06,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:06,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83057500] [2021-05-02 20:32:06,688 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:06,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238247431] [2021-05-02 20:32:06,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238247431] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:06,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:06,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:32:06,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603131865] [2021-05-02 20:32:06,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:32:06,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:06,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:32:06,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:32:06,689 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 20:32:06,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:06,827 INFO L93 Difference]: Finished difference Result 89 states and 120 transitions. [2021-05-02 20:32:06,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:32:06,827 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2021-05-02 20:32:06,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:06,828 INFO L225 Difference]: With dead ends: 89 [2021-05-02 20:32:06,828 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 20:32:06,828 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:32:06,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 20:32:06,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-05-02 20:32:06,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 45 states have internal predecessors, (48), 28 states have call successors, (28), 9 states have call predecessors, (28), 8 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 20:32:06,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 20:32:06,834 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 67 [2021-05-02 20:32:06,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:06,834 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 20:32:06,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 20:32:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 20:32:06,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:32:06,835 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:06,835 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:07,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:07,049 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:07,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:07,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2021-05-02 20:32:07,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:07,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901119112] [2021-05-02 20:32:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:07,057 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:07,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418099509] [2021-05-02 20:32:07,057 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 20:32:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:07,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:32:07,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:07,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 20:32:07,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:07,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901119112] [2021-05-02 20:32:07,283 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:07,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418099509] [2021-05-02 20:32:07,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418099509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:07,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:07,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:32:07,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655779126] [2021-05-02 20:32:07,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:32:07,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:07,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:32:07,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:32:07,284 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:32:07,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:07,410 INFO L93 Difference]: Finished difference Result 116 states and 163 transitions. [2021-05-02 20:32:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:32:07,412 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 20:32:07,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:07,413 INFO L225 Difference]: With dead ends: 116 [2021-05-02 20:32:07,413 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:32:07,413 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:32:07,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:32:07,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2021-05-02 20:32:07,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 59 states have internal predecessors, (65), 41 states have call successors, (41), 9 states have call predecessors, (41), 8 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 20:32:07,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 145 transitions. [2021-05-02 20:32:07,420 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 145 transitions. Word has length 69 [2021-05-02 20:32:07,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:07,420 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 145 transitions. [2021-05-02 20:32:07,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:32:07,420 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 145 transitions. [2021-05-02 20:32:07,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 20:32:07,421 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:07,421 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1] [2021-05-02 20:32:07,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:07,637 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:07,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:07,637 INFO L82 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2021-05-02 20:32:07,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:07,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579021778] [2021-05-02 20:32:07,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:07,644 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:07,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075555672] [2021-05-02 20:32:07,645 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 20:32:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:07,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:32:07,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:07,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-05-02 20:32:07,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:07,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579021778] [2021-05-02 20:32:07,933 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:07,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075555672] [2021-05-02 20:32:07,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075555672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:07,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:07,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:32:07,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115494670] [2021-05-02 20:32:07,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:32:07,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:07,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:32:07,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:32:07,934 INFO L87 Difference]: Start difference. First operand 105 states and 145 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:32:08,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:08,143 INFO L93 Difference]: Finished difference Result 148 states and 211 transitions. [2021-05-02 20:32:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:32:08,144 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2021-05-02 20:32:08,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:08,146 INFO L225 Difference]: With dead ends: 148 [2021-05-02 20:32:08,146 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 20:32:08,146 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:32:08,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 20:32:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-05-02 20:32:08,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 81 states have internal predecessors, (89), 60 states have call successors, (60), 10 states have call predecessors, (60), 9 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 20:32:08,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 206 transitions. [2021-05-02 20:32:08,165 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 206 transitions. Word has length 75 [2021-05-02 20:32:08,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:08,166 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 206 transitions. [2021-05-02 20:32:08,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:32:08,166 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 206 transitions. [2021-05-02 20:32:08,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:32:08,166 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:08,167 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:08,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:32:08,378 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:08,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:08,380 INFO L82 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2021-05-02 20:32:08,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:08,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414224079] [2021-05-02 20:32:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:08,387 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:08,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194731908] [2021-05-02 20:32:08,387 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 20:32:08,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:32:08,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:08,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 20:32:08,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:08,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-05-02 20:32:08,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:08,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414224079] [2021-05-02 20:32:08,722 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:08,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194731908] [2021-05-02 20:32:08,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194731908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:08,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:08,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:32:08,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746510665] [2021-05-02 20:32:08,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:32:08,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:08,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:32:08,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:32:08,724 INFO L87 Difference]: Start difference. First operand 144 states and 206 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:32:08,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:08,886 INFO L93 Difference]: Finished difference Result 150 states and 211 transitions. [2021-05-02 20:32:08,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:32:08,887 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2021-05-02 20:32:08,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:08,889 INFO L225 Difference]: With dead ends: 150 [2021-05-02 20:32:08,889 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 20:32:08,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:32:08,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 20:32:08,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-05-02 20:32:08,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 77 states have (on average 1.1948051948051948) internal successors, (92), 84 states have internal predecessors, (92), 60 states have call successors, (60), 11 states have call predecessors, (60), 10 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 20:32:08,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 209 transitions. [2021-05-02 20:32:08,896 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 209 transitions. Word has length 80 [2021-05-02 20:32:08,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:08,896 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 209 transitions. [2021-05-02 20:32:08,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:32:08,896 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 209 transitions. [2021-05-02 20:32:08,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 20:32:08,897 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:08,897 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1, 1, 1, 1] [2021-05-02 20:32:09,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:09,112 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:09,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:09,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2021-05-02 20:32:09,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:09,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258521062] [2021-05-02 20:32:09,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:09,119 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:09,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570899052] [2021-05-02 20:32:09,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:32:09,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:32:09,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:09,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 20:32:09,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:09,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-05-02 20:32:09,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:09,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258521062] [2021-05-02 20:32:09,504 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:09,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570899052] [2021-05-02 20:32:09,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570899052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:09,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:09,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:32:09,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928778527] [2021-05-02 20:32:09,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:32:09,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:09,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:32:09,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:32:09,507 INFO L87 Difference]: Start difference. First operand 148 states and 209 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:32:09,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:09,869 INFO L93 Difference]: Finished difference Result 154 states and 214 transitions. [2021-05-02 20:32:09,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:32:09,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2021-05-02 20:32:09,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:09,871 INFO L225 Difference]: With dead ends: 154 [2021-05-02 20:32:09,871 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 20:32:09,871 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 230.8ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:32:09,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 20:32:09,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-05-02 20:32:09,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 80 states have (on average 1.1875) internal successors, (95), 87 states have internal predecessors, (95), 60 states have call successors, (60), 12 states have call predecessors, (60), 11 states have return successors, (57), 52 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 20:32:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 212 transitions. [2021-05-02 20:32:09,876 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 212 transitions. Word has length 85 [2021-05-02 20:32:09,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:09,876 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 212 transitions. [2021-05-02 20:32:09,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:32:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 212 transitions. [2021-05-02 20:32:09,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:32:09,877 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:09,877 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:10,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:10,093 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:10,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:10,094 INFO L82 PathProgramCache]: Analyzing trace with hash 583225195, now seen corresponding path program 2 times [2021-05-02 20:32:10,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:10,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576379303] [2021-05-02 20:32:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:10,107 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:10,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021143898] [2021-05-02 20:32:10,107 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 20:32:10,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:32:10,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:10,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:32:10,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:10,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 27 proven. 35 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-02 20:32:10,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:10,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576379303] [2021-05-02 20:32:10,335 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:10,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021143898] [2021-05-02 20:32:10,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021143898] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:10,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:10,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:32:10,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373375080] [2021-05-02 20:32:10,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:32:10,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:10,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:32:10,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:32:10,336 INFO L87 Difference]: Start difference. First operand 152 states and 212 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 20:32:10,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:10,575 INFO L93 Difference]: Finished difference Result 213 states and 317 transitions. [2021-05-02 20:32:10,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:32:10,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 89 [2021-05-02 20:32:10,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:10,577 INFO L225 Difference]: With dead ends: 213 [2021-05-02 20:32:10,577 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 20:32:10,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:32:10,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 20:32:10,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 186. [2021-05-02 20:32:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 100 states have internal predecessors, (113), 80 states have call successors, (80), 13 states have call predecessors, (80), 12 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2021-05-02 20:32:10,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 270 transitions. [2021-05-02 20:32:10,584 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 270 transitions. Word has length 89 [2021-05-02 20:32:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:10,584 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 270 transitions. [2021-05-02 20:32:10,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 20:32:10,584 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 270 transitions. [2021-05-02 20:32:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 20:32:10,585 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:10,585 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:10,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:32:10,801 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:10,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:10,801 INFO L82 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2021-05-02 20:32:10,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:10,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590843292] [2021-05-02 20:32:10,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:10,807 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:10,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101438520] [2021-05-02 20:32:10,807 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 20:32:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:10,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 20:32:10,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:10,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:10,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:10,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:10,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:10,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:10,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:10,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:10,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:10,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:10,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:10,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:10,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:10,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:10,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:10,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:10,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:10,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:10,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:11,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:11,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:11,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:11,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:11,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:11,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:11,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:11,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:11,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:11,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:11,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:11,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-05-02 20:32:11,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:11,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590843292] [2021-05-02 20:32:11,240 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:11,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101438520] [2021-05-02 20:32:11,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101438520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:11,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:11,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:32:11,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724265038] [2021-05-02 20:32:11,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:32:11,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:11,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:32:11,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:32:11,241 INFO L87 Difference]: Start difference. First operand 186 states and 270 transitions. Second operand has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 20:32:11,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:11,722 INFO L93 Difference]: Finished difference Result 219 states and 318 transitions. [2021-05-02 20:32:11,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:32:11,722 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 91 [2021-05-02 20:32:11,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:11,723 INFO L225 Difference]: With dead ends: 219 [2021-05-02 20:32:11,723 INFO L226 Difference]: Without dead ends: 218 [2021-05-02 20:32:11,724 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 296.8ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:32:11,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-02 20:32:11,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-05-02 20:32:11,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 117 states have internal predecessors, (132), 93 states have call successors, (93), 15 states have call predecessors, (93), 14 states have return successors, (90), 84 states have call predecessors, (90), 90 states have call successors, (90) [2021-05-02 20:32:11,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 315 transitions. [2021-05-02 20:32:11,735 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 315 transitions. Word has length 91 [2021-05-02 20:32:11,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:11,736 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 315 transitions. [2021-05-02 20:32:11,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 14 states have internal predecessors, (29), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 20:32:11,737 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 315 transitions. [2021-05-02 20:32:11,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 20:32:11,737 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:11,737 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 20:32:11,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:32:11,945 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:11,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:11,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1735983139, now seen corresponding path program 4 times [2021-05-02 20:32:11,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:11,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488716911] [2021-05-02 20:32:11,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:11,962 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:11,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445437739] [2021-05-02 20:32:11,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:32:12,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:32:12,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:12,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:32:12,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:12,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-02 20:32:12,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:12,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488716911] [2021-05-02 20:32:12,122 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:12,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445437739] [2021-05-02 20:32:12,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445437739] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:32:12,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:32:12,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:32:12,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641680647] [2021-05-02 20:32:12,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:32:12,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:12,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:32:12,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:32:12,124 INFO L87 Difference]: Start difference. First operand 217 states and 315 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-05-02 20:32:12,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:12,165 INFO L93 Difference]: Finished difference Result 194 states and 271 transitions. [2021-05-02 20:32:12,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:32:12,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2021-05-02 20:32:12,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:12,166 INFO L225 Difference]: With dead ends: 194 [2021-05-02 20:32:12,166 INFO L226 Difference]: Without dead ends: 194 [2021-05-02 20:32:12,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:32:12,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-02 20:32:12,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 185. [2021-05-02 20:32:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 94 states have (on average 1.148936170212766) internal successors, (108), 101 states have internal predecessors, (108), 76 states have call successors, (76), 15 states have call predecessors, (76), 14 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 20:32:12,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 257 transitions. [2021-05-02 20:32:12,173 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 257 transitions. Word has length 100 [2021-05-02 20:32:12,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:12,173 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 257 transitions. [2021-05-02 20:32:12,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-05-02 20:32:12,173 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 257 transitions. [2021-05-02 20:32:12,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 20:32:12,174 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:12,174 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:12,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:32:12,389 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:12,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:12,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2021-05-02 20:32:12,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:12,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306152944] [2021-05-02 20:32:12,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:12,395 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:12,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532002306] [2021-05-02 20:32:12,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:32:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:12,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 20:32:12,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:12,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 68 proven. 41 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-05-02 20:32:12,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:12,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306152944] [2021-05-02 20:32:12,946 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:12,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532002306] [2021-05-02 20:32:12,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532002306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:12,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:12,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:32:12,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070419845] [2021-05-02 20:32:12,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:32:12,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:12,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:32:12,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:32:12,949 INFO L87 Difference]: Start difference. First operand 185 states and 257 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 20:32:18,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:18,078 INFO L93 Difference]: Finished difference Result 190 states and 261 transitions. [2021-05-02 20:32:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:32:18,079 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2021-05-02 20:32:18,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:18,080 INFO L225 Difference]: With dead ends: 190 [2021-05-02 20:32:18,080 INFO L226 Difference]: Without dead ends: 190 [2021-05-02 20:32:18,080 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 347.9ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:32:18,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-02 20:32:18,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 158. [2021-05-02 20:32:18,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 87 states have internal predecessors, (93), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (60), 56 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 20:32:18,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 216 transitions. [2021-05-02 20:32:18,084 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 216 transitions. Word has length 107 [2021-05-02 20:32:18,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:18,085 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 216 transitions. [2021-05-02 20:32:18,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 20:32:18,085 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 216 transitions. [2021-05-02 20:32:18,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 20:32:18,086 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:18,086 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 20:32:18,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:18,301 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:18,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:18,304 INFO L82 PathProgramCache]: Analyzing trace with hash 82449829, now seen corresponding path program 3 times [2021-05-02 20:32:18,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:18,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972825513] [2021-05-02 20:32:18,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:18,317 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:18,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [900126374] [2021-05-02 20:32:18,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:32:18,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:32:18,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:18,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:32:18,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:18,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:18,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:18,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:18,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:18,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:18,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 87 proven. 11 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-05-02 20:32:18,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:18,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972825513] [2021-05-02 20:32:18,582 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:18,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900126374] [2021-05-02 20:32:18,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900126374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:18,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:18,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:32:18,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045142453] [2021-05-02 20:32:18,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:32:18,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:18,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:32:18,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:32:18,583 INFO L87 Difference]: Start difference. First operand 158 states and 216 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-02 20:32:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:18,653 INFO L93 Difference]: Finished difference Result 162 states and 219 transitions. [2021-05-02 20:32:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:32:18,654 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-05-02 20:32:18,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:18,655 INFO L225 Difference]: With dead ends: 162 [2021-05-02 20:32:18,655 INFO L226 Difference]: Without dead ends: 162 [2021-05-02 20:32:18,655 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:32:18,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-02 20:32:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 138. [2021-05-02 20:32:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 79 states have internal predecessors, (83), 50 states have call successors, (50), 14 states have call predecessors, (50), 13 states have return successors, (47), 44 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-02 20:32:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 180 transitions. [2021-05-02 20:32:18,660 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 180 transitions. Word has length 111 [2021-05-02 20:32:18,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:18,660 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 180 transitions. [2021-05-02 20:32:18,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-02 20:32:18,660 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2021-05-02 20:32:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 20:32:18,661 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:18,661 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-05-02 20:32:18,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:32:18,877 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:18,877 INFO L82 PathProgramCache]: Analyzing trace with hash -966740615, now seen corresponding path program 2 times [2021-05-02 20:32:18,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:18,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165752985] [2021-05-02 20:32:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:18,885 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:18,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652513395] [2021-05-02 20:32:18,885 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:18,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:32:18,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:18,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 20:32:18,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:18,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:18,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:18,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:18,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:18,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:18,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 75 proven. 65 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-05-02 20:32:19,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:19,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165752985] [2021-05-02 20:32:19,461 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:19,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652513395] [2021-05-02 20:32:19,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652513395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:19,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:19,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:32:19,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348061076] [2021-05-02 20:32:19,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:32:19,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:19,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:32:19,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:32:19,463 INFO L87 Difference]: Start difference. First operand 138 states and 180 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 20:32:20,723 WARN L205 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-05-02 20:32:20,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:20,884 INFO L93 Difference]: Finished difference Result 172 states and 228 transitions. [2021-05-02 20:32:20,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:32:20,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 113 [2021-05-02 20:32:20,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:20,885 INFO L225 Difference]: With dead ends: 172 [2021-05-02 20:32:20,885 INFO L226 Difference]: Without dead ends: 171 [2021-05-02 20:32:20,886 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1233.5ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 20:32:20,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-02 20:32:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2021-05-02 20:32:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 96 states have internal predecessors, (101), 63 states have call successors, (63), 16 states have call predecessors, (63), 15 states have return successors, (60), 56 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 20:32:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 224 transitions. [2021-05-02 20:32:20,890 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 224 transitions. Word has length 113 [2021-05-02 20:32:20,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:20,890 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 224 transitions. [2021-05-02 20:32:20,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 20:32:20,890 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 224 transitions. [2021-05-02 20:32:20,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 20:32:20,891 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:20,891 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:21,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:32:21,105 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:21,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:21,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1855467922, now seen corresponding path program 3 times [2021-05-02 20:32:21,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:21,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801536417] [2021-05-02 20:32:21,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:21,116 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:21,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710054812] [2021-05-02 20:32:21,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:21,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:32:21,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:21,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:32:21,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:21,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-02 20:32:21,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:21,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801536417] [2021-05-02 20:32:21,323 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:21,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710054812] [2021-05-02 20:32:21,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710054812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:21,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:21,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:32:21,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141219701] [2021-05-02 20:32:21,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:32:21,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:21,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:32:21,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:32:21,327 INFO L87 Difference]: Start difference. First operand 169 states and 224 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-02 20:32:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:21,504 INFO L93 Difference]: Finished difference Result 207 states and 292 transitions. [2021-05-02 20:32:21,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:32:21,504 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2021-05-02 20:32:21,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:21,505 INFO L225 Difference]: With dead ends: 207 [2021-05-02 20:32:21,506 INFO L226 Difference]: Without dead ends: 207 [2021-05-02 20:32:21,506 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:32:21,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-02 20:32:21,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 188. [2021-05-02 20:32:21,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 99 states have internal predecessors, (112), 75 states have call successors, (75), 16 states have call predecessors, (75), 15 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 20:32:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 259 transitions. [2021-05-02 20:32:21,511 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 259 transitions. Word has length 116 [2021-05-02 20:32:21,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:21,511 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 259 transitions. [2021-05-02 20:32:21,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-02 20:32:21,511 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 259 transitions. [2021-05-02 20:32:21,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 20:32:21,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:21,512 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-02 20:32:21,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:32:21,728 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:21,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:21,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1380247977, now seen corresponding path program 2 times [2021-05-02 20:32:21,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:21,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067895831] [2021-05-02 20:32:21,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:21,733 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:21,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409340087] [2021-05-02 20:32:21,733 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:21,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:32:21,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:21,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:32:21,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:21,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:21,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 49 proven. 62 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2021-05-02 20:32:22,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:22,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067895831] [2021-05-02 20:32:22,281 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:22,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409340087] [2021-05-02 20:32:22,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409340087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:22,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:22,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:32:22,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436620373] [2021-05-02 20:32:22,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:32:22,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:22,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:32:22,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:32:22,283 INFO L87 Difference]: Start difference. First operand 188 states and 259 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 20:32:24,081 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-05-02 20:32:24,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:24,781 INFO L93 Difference]: Finished difference Result 265 states and 378 transitions. [2021-05-02 20:32:24,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 20:32:24,781 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 122 [2021-05-02 20:32:24,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:24,785 INFO L225 Difference]: With dead ends: 265 [2021-05-02 20:32:24,785 INFO L226 Difference]: Without dead ends: 265 [2021-05-02 20:32:24,785 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1121.0ms TimeCoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 20:32:24,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-02 20:32:24,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 259. [2021-05-02 20:32:24,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 132 states have internal predecessors, (152), 111 states have call successors, (111), 18 states have call predecessors, (111), 17 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2021-05-02 20:32:24,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 371 transitions. [2021-05-02 20:32:24,791 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 371 transitions. Word has length 122 [2021-05-02 20:32:24,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:24,791 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 371 transitions. [2021-05-02 20:32:24,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 20:32:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 371 transitions. [2021-05-02 20:32:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 20:32:24,793 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:24,793 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-05-02 20:32:25,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:25,009 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:25,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:25,010 INFO L82 PathProgramCache]: Analyzing trace with hash 259955901, now seen corresponding path program 3 times [2021-05-02 20:32:25,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:25,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320938349] [2021-05-02 20:32:25,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:25,017 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:25,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558382706] [2021-05-02 20:32:25,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:25,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:32:25,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:25,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 20:32:25,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:25,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:25,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:25,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:25,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:25,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 78 proven. 41 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-05-02 20:32:25,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:25,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320938349] [2021-05-02 20:32:25,603 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:25,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558382706] [2021-05-02 20:32:25,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558382706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:25,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:25,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:32:25,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386131942] [2021-05-02 20:32:25,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:32:25,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:25,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:32:25,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:32:25,605 INFO L87 Difference]: Start difference. First operand 259 states and 371 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 20:32:26,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:26,195 INFO L93 Difference]: Finished difference Result 299 states and 421 transitions. [2021-05-02 20:32:26,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:32:26,196 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2021-05-02 20:32:26,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:26,197 INFO L225 Difference]: With dead ends: 299 [2021-05-02 20:32:26,197 INFO L226 Difference]: Without dead ends: 299 [2021-05-02 20:32:26,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 258.8ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:32:26,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-05-02 20:32:26,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 296. [2021-05-02 20:32:26,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 151 states have (on average 1.1589403973509933) internal successors, (175), 153 states have internal predecessors, (175), 123 states have call successors, (123), 22 states have call predecessors, (123), 21 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 20:32:26,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 418 transitions. [2021-05-02 20:32:26,204 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 418 transitions. Word has length 127 [2021-05-02 20:32:26,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:26,204 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 418 transitions. [2021-05-02 20:32:26,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 20:32:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 418 transitions. [2021-05-02 20:32:26,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 20:32:26,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:26,205 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:26,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:26,420 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:26,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:26,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1431100670, now seen corresponding path program 4 times [2021-05-02 20:32:26,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:26,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054912054] [2021-05-02 20:32:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:26,427 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:26,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419947760] [2021-05-02 20:32:26,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:26,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:32:26,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:26,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 20:32:26,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:26,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:26,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:27,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:27,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 119 proven. 93 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-05-02 20:32:27,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:27,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054912054] [2021-05-02 20:32:27,072 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:27,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419947760] [2021-05-02 20:32:27,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419947760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:27,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:27,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:32:27,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821715687] [2021-05-02 20:32:27,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:32:27,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:27,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:32:27,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:32:27,073 INFO L87 Difference]: Start difference. First operand 296 states and 418 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-02 20:32:31,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:31,605 INFO L93 Difference]: Finished difference Result 314 states and 432 transitions. [2021-05-02 20:32:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:32:31,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2021-05-02 20:32:31,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:31,607 INFO L225 Difference]: With dead ends: 314 [2021-05-02 20:32:31,607 INFO L226 Difference]: Without dead ends: 314 [2021-05-02 20:32:31,608 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:32:31,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-02 20:32:31,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2021-05-02 20:32:31,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 163 states have (on average 1.147239263803681) internal successors, (187), 165 states have internal predecessors, (187), 123 states have call successors, (123), 26 states have call predecessors, (123), 25 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 20:32:31,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 430 transitions. [2021-05-02 20:32:31,614 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 430 transitions. Word has length 129 [2021-05-02 20:32:31,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:31,614 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 430 transitions. [2021-05-02 20:32:31,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-02 20:32:31,614 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 430 transitions. [2021-05-02 20:32:31,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 20:32:31,615 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:31,615 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-05-02 20:32:31,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 20:32:31,816 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:31,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:31,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1491357193, now seen corresponding path program 5 times [2021-05-02 20:32:31,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:31,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152497073] [2021-05-02 20:32:31,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:31,822 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:31,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804955855] [2021-05-02 20:32:31,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:35,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 20:32:35,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:35,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-02 20:32:35,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:35,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:35,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:36,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:36,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:36,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:36,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:36,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:36,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:36,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:36,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:36,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:36,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:36,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:36,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:36,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:36,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 91 proven. 81 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-05-02 20:32:36,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:36,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152497073] [2021-05-02 20:32:36,237 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:36,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804955855] [2021-05-02 20:32:36,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804955855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:36,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:36,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 20:32:36,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918157130] [2021-05-02 20:32:36,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 20:32:36,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:36,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 20:32:36,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:32:36,238 INFO L87 Difference]: Start difference. First operand 312 states and 430 transitions. Second operand has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) [2021-05-02 20:32:38,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:38,815 INFO L93 Difference]: Finished difference Result 333 states and 447 transitions. [2021-05-02 20:32:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 20:32:38,817 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) Word has length 132 [2021-05-02 20:32:38,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:38,819 INFO L225 Difference]: With dead ends: 333 [2021-05-02 20:32:38,819 INFO L226 Difference]: Without dead ends: 333 [2021-05-02 20:32:38,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1003.1ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-05-02 20:32:38,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-05-02 20:32:38,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 328. [2021-05-02 20:32:38,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 175 states have (on average 1.1371428571428572) internal successors, (199), 177 states have internal predecessors, (199), 123 states have call successors, (123), 30 states have call predecessors, (123), 29 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 20:32:38,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 442 transitions. [2021-05-02 20:32:38,826 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 442 transitions. Word has length 132 [2021-05-02 20:32:38,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:38,826 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 442 transitions. [2021-05-02 20:32:38,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 15 states have internal predecessors, (35), 10 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 10 states have call predecessors, (22), 9 states have call successors, (22) [2021-05-02 20:32:38,826 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 442 transitions. [2021-05-02 20:32:38,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 20:32:38,827 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:38,827 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1] [2021-05-02 20:32:39,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 20:32:39,036 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:39,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:39,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1694952883, now seen corresponding path program 4 times [2021-05-02 20:32:39,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:39,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182951275] [2021-05-02 20:32:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:39,051 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:39,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20903186] [2021-05-02 20:32:39,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:39,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:32:39,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:39,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-02 20:32:39,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:39,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 84 proven. 85 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-05-02 20:32:39,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:39,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182951275] [2021-05-02 20:32:39,599 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:39,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20903186] [2021-05-02 20:32:39,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20903186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:39,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:39,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:32:39,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87622149] [2021-05-02 20:32:39,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:32:39,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:39,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:32:39,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:32:39,600 INFO L87 Difference]: Start difference. First operand 328 states and 442 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 20:32:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:40,364 INFO L93 Difference]: Finished difference Result 362 states and 495 transitions. [2021-05-02 20:32:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:32:40,364 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) Word has length 135 [2021-05-02 20:32:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:40,366 INFO L225 Difference]: With dead ends: 362 [2021-05-02 20:32:40,366 INFO L226 Difference]: Without dead ends: 361 [2021-05-02 20:32:40,366 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 399.1ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 20:32:40,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-05-02 20:32:40,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 359. [2021-05-02 20:32:40,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 189 states have (on average 1.1428571428571428) internal successors, (216), 191 states have internal predecessors, (216), 139 states have call successors, (139), 31 states have call predecessors, (139), 30 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-02 20:32:40,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 491 transitions. [2021-05-02 20:32:40,382 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 491 transitions. Word has length 135 [2021-05-02 20:32:40,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:40,382 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 491 transitions. [2021-05-02 20:32:40,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 20:32:40,383 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 491 transitions. [2021-05-02 20:32:40,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 20:32:40,383 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:40,384 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-05-02 20:32:40,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:40,588 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:40,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:40,588 INFO L82 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 5 times [2021-05-02 20:32:40,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:40,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940041074] [2021-05-02 20:32:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:40,597 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:40,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110434058] [2021-05-02 20:32:40,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:40,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 20:32:40,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:40,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-02 20:32:40,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:40,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:40,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:41,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:41,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:41,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:41,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 102 proven. 153 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-05-02 20:32:43,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:43,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940041074] [2021-05-02 20:32:43,636 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:43,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110434058] [2021-05-02 20:32:43,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110434058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:43,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:43,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 20:32:43,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905368956] [2021-05-02 20:32:43,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 20:32:43,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:43,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 20:32:43,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=362, Unknown=1, NotChecked=0, Total=420 [2021-05-02 20:32:43,637 INFO L87 Difference]: Start difference. First operand 359 states and 491 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 20:32:48,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:48,717 INFO L93 Difference]: Finished difference Result 411 states and 559 transitions. [2021-05-02 20:32:48,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:32:48,718 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) Word has length 138 [2021-05-02 20:32:48,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:48,719 INFO L225 Difference]: With dead ends: 411 [2021-05-02 20:32:48,719 INFO L226 Difference]: Without dead ends: 411 [2021-05-02 20:32:48,720 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2820.9ms TimeCoverageRelationStatistics Valid=101, Invalid=710, Unknown=1, NotChecked=0, Total=812 [2021-05-02 20:32:48,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-05-02 20:32:48,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 407. [2021-05-02 20:32:48,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 215 states have (on average 1.1441860465116278) internal successors, (246), 218 states have internal predecessors, (246), 156 states have call successors, (156), 36 states have call predecessors, (156), 35 states have return successors, (153), 152 states have call predecessors, (153), 153 states have call successors, (153) [2021-05-02 20:32:48,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 555 transitions. [2021-05-02 20:32:48,728 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 555 transitions. Word has length 138 [2021-05-02 20:32:48,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:48,728 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 555 transitions. [2021-05-02 20:32:48,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-02 20:32:48,728 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 555 transitions. [2021-05-02 20:32:48,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 20:32:48,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:48,729 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1] [2021-05-02 20:32:48,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 20:32:48,945 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:48,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:48,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1199073726, now seen corresponding path program 1 times [2021-05-02 20:32:48,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:48,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366409667] [2021-05-02 20:32:48,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:48,950 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:48,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710723665] [2021-05-02 20:32:48,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:49,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:32:49,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 20:32:49,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:49,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 59 proven. 123 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-05-02 20:32:49,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:32:49,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366409667] [2021-05-02 20:32:49,577 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:32:49,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710723665] [2021-05-02 20:32:49,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710723665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:32:49,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:32:49,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 20:32:49,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470948196] [2021-05-02 20:32:49,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 20:32:49,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:32:49,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 20:32:49,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:32:49,578 INFO L87 Difference]: Start difference. First operand 407 states and 555 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2021-05-02 20:32:50,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:32:50,486 INFO L93 Difference]: Finished difference Result 419 states and 565 transitions. [2021-05-02 20:32:50,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:32:50,486 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 143 [2021-05-02 20:32:50,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:32:50,488 INFO L225 Difference]: With dead ends: 419 [2021-05-02 20:32:50,488 INFO L226 Difference]: Without dead ends: 417 [2021-05-02 20:32:50,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 556.9ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-05-02 20:32:50,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-05-02 20:32:50,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 414. [2021-05-02 20:32:50,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 221 states have (on average 1.1357466063348416) internal successors, (251), 223 states have internal predecessors, (251), 155 states have call successors, (155), 38 states have call predecessors, (155), 37 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2021-05-02 20:32:50,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 558 transitions. [2021-05-02 20:32:50,497 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 558 transitions. Word has length 143 [2021-05-02 20:32:50,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:32:50,498 INFO L480 AbstractCegarLoop]: Abstraction has 414 states and 558 transitions. [2021-05-02 20:32:50,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2021-05-02 20:32:50,498 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 558 transitions. [2021-05-02 20:32:50,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-02 20:32:50,499 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:32:50,499 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:32:50,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:50,713 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:32:50,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:32:50,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1825079459, now seen corresponding path program 6 times [2021-05-02 20:32:50,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:32:50,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238031895] [2021-05-02 20:32:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:32:50,718 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:32:50,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850426788] [2021-05-02 20:32:50,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:32:58,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 20:32:58,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:32:58,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 20:32:58,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:32:58,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:32:58,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:03,345 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 20:33:32,493 WARN L205 SmtUtils]: Spent 22.71 s on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 20:33:34,520 WARN L838 $PredicateComparison]: unable to prove that (and (= (+ (* c_main_~x~0 c_main_~y~0 c_main_~p~0) (* c_main_~y~0 c_main_~y~0 c_main_~r~0) c_main_~a~0) (+ (* c_main_~y~0 c_main_~r~0) (* c_main_~y~0 c_main_~a~0) (* c_main_~x~0 c_main_~p~0))) (< c_main_~y~0 (* 2 c_main_~a~0)) (< c_main_~a~0 c_main_~y~0) (< (* c_main_~x~0 c_main_~y~0) 2147483647) (<= 0 c_main_~x~0) (<= c_main_~x~0 50) (= c_main_~p~0 1)) is different from false [2021-05-02 20:33:34,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:34,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:36,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:38,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,182 WARN L205 SmtUtils]: Spent 12.88 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:33:56,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:56,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:33:58,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:00,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:17,129 WARN L205 SmtUtils]: Spent 12.22 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:34:17,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:17,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:19,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:21,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:23,257 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_112 Int) (v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int)) (let ((.cse1 (* v_main_~x~0_BEFORE_CALL_261 v_main_~y~0_BEFORE_CALL_215)) (.cse0 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215))) (and (not (= v_main_~a~0_BEFORE_CALL_112 (+ v_main_~x~0_BEFORE_CALL_261 .cse0))) (< v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215) (<= v_main_~x~0_BEFORE_CALL_261 50) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (= (+ v_main_~a~0_BEFORE_CALL_112 .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215)) (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215))) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_112))))) is different from false [2021-05-02 20:34:25,263 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_112 Int) (v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int)) (let ((.cse1 (* v_main_~x~0_BEFORE_CALL_261 v_main_~y~0_BEFORE_CALL_215)) (.cse0 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215))) (and (not (= v_main_~a~0_BEFORE_CALL_112 (+ v_main_~x~0_BEFORE_CALL_261 .cse0))) (< v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215) (<= v_main_~x~0_BEFORE_CALL_261 50) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (= (+ v_main_~a~0_BEFORE_CALL_112 .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215)) (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215))) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_112))))) is different from true [2021-05-02 20:34:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 110 proven. 69 refuted. 2 times theorem prover too weak. 496 trivial. 16 not checked. [2021-05-02 20:34:25,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:25,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238031895] [2021-05-02 20:34:25,264 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:25,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850426788] [2021-05-02 20:34:25,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850426788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:25,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:25,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 20:34:25,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527025187] [2021-05-02 20:34:25,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 20:34:25,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:25,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 20:34:25,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=251, Unknown=11, NotChecked=66, Total=380 [2021-05-02 20:34:25,266 INFO L87 Difference]: Start difference. First operand 414 states and 558 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 20:34:38,272 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 40 DAG size of output: 6 [2021-05-02 20:34:55,643 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-05-02 20:35:27,936 WARN L205 SmtUtils]: Spent 26.74 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-05-02 20:37:07,897 WARN L205 SmtUtils]: Spent 1.26 m on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-05-02 20:37:40,688 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (exists ((v_main_~a~0_BEFORE_CALL_112 Int) (v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int)) (let ((.cse2 (* v_main_~x~0_BEFORE_CALL_261 v_main_~y~0_BEFORE_CALL_215)) (.cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215))) (and (not (= v_main_~a~0_BEFORE_CALL_112 (+ v_main_~x~0_BEFORE_CALL_261 .cse1))) (< v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215) (<= v_main_~x~0_BEFORE_CALL_261 50) (< .cse2 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (= (+ v_main_~a~0_BEFORE_CALL_112 .cse2 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215)) (+ v_main_~x~0_BEFORE_CALL_261 .cse1 (* v_main_~a~0_BEFORE_CALL_112 v_main_~y~0_BEFORE_CALL_215))) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_112))))))) (and (or (= |c___VERIFIER_assert_#in~cond| 1) (and (= |c___VERIFIER_assert_#in~cond| 0) .cse0)) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond) (or (= c___VERIFIER_assert_~cond 1) (and (= c___VERIFIER_assert_~cond 0) .cse0)) .cse0)) is different from false [2021-05-02 20:37:44,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:37:44,749 INFO L93 Difference]: Finished difference Result 507 states and 694 transitions. [2021-05-02 20:37:44,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 20:37:44,750 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 144 [2021-05-02 20:37:44,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:37:44,752 INFO L225 Difference]: With dead ends: 507 [2021-05-02 20:37:44,752 INFO L226 Difference]: Without dead ends: 506 [2021-05-02 20:37:44,752 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 199336.2ms TimeCoverageRelationStatistics Valid=101, Invalid=543, Unknown=18, NotChecked=150, Total=812 [2021-05-02 20:37:44,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-05-02 20:37:44,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 436. [2021-05-02 20:37:44,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 237 states have (on average 1.1265822784810127) internal successors, (267), 240 states have internal predecessors, (267), 157 states have call successors, (157), 42 states have call predecessors, (157), 41 states have return successors, (154), 153 states have call predecessors, (154), 154 states have call successors, (154) [2021-05-02 20:37:44,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 578 transitions. [2021-05-02 20:37:44,761 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 578 transitions. Word has length 144 [2021-05-02 20:37:44,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:37:44,761 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 578 transitions. [2021-05-02 20:37:44,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 20:37:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 578 transitions. [2021-05-02 20:37:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-02 20:37:44,762 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:37:44,762 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:37:44,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 20:37:44,970 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:37:44,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:37:44,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1855514487, now seen corresponding path program 7 times [2021-05-02 20:37:44,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:37:44,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559096913] [2021-05-02 20:37:44,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:37:44,977 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:37:44,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715831184] [2021-05-02 20:37:44,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:37:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:37:45,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 99 conjunts are in the unsatisfiable core [2021-05-02 20:37:45,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:37:45,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:45,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:48,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:48,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:48,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:50,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:50,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:50,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:50,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:52,096 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~s~0_BEFORE_CALL_213 Int) (v_main_~c~0_BEFORE_CALL_189 Int) (v_main_~b~0_BEFORE_CALL_241 Int)) (let ((.cse0 (* v_main_~s~0_BEFORE_CALL_213 v_main_~c~0_BEFORE_CALL_189)) (.cse1 (* v_main_~s~0_BEFORE_CALL_213 v_main_~b~0_BEFORE_CALL_241))) (and (<= (+ .cse0 .cse1 1) v_main_~b~0_BEFORE_CALL_241) (= (+ v_main_~c~0_BEFORE_CALL_189 .cse0 v_main_~b~0_BEFORE_CALL_241 .cse1) 0) (< 0 v_main_~c~0_BEFORE_CALL_189)))) is different from false [2021-05-02 20:37:52,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:52,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:52,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:52,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:52,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:52,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:52,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:52,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:52,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:52,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 129 proven. 197 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-05-02 20:37:52,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:37:52,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559096913] [2021-05-02 20:37:52,421 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:37:52,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715831184] [2021-05-02 20:37:52,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715831184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:37:52,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:37:52,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 20:37:52,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236435559] [2021-05-02 20:37:52,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 20:37:52,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:37:52,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 20:37:52,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-02 20:37:52,422 INFO L87 Difference]: Start difference. First operand 436 states and 578 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2021-05-02 20:37:53,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:37:53,714 INFO L93 Difference]: Finished difference Result 476 states and 628 transitions. [2021-05-02 20:37:53,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:37:53,718 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) Word has length 149 [2021-05-02 20:37:53,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:37:53,719 INFO L225 Difference]: With dead ends: 476 [2021-05-02 20:37:53,719 INFO L226 Difference]: Without dead ends: 476 [2021-05-02 20:37:53,720 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3000.2ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-05-02 20:37:53,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-05-02 20:37:53,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 473. [2021-05-02 20:37:53,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 258 states have (on average 1.124031007751938) internal successors, (290), 261 states have internal predecessors, (290), 169 states have call successors, (169), 46 states have call predecessors, (169), 45 states have return successors, (166), 165 states have call predecessors, (166), 166 states have call successors, (166) [2021-05-02 20:37:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 625 transitions. [2021-05-02 20:37:53,727 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 625 transitions. Word has length 149 [2021-05-02 20:37:53,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:37:53,728 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 625 transitions. [2021-05-02 20:37:53,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 11 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 11 states have call successors, (25) [2021-05-02 20:37:53,728 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 625 transitions. [2021-05-02 20:37:53,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-02 20:37:53,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:37:53,729 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 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 20:37:53,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:37:53,944 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:37:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:37:53,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1402624196, now seen corresponding path program 8 times [2021-05-02 20:37:53,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:37:53,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271130436] [2021-05-02 20:37:53,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:37:53,951 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:37:53,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601682465] [2021-05-02 20:37:53,951 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:37:54,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:37:54,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:37:54,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-02 20:37:54,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:37:54,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:54,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:55,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:55,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 158 proven. 187 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-05-02 20:37:55,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:37:55,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271130436] [2021-05-02 20:37:55,114 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:37:55,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601682465] [2021-05-02 20:37:55,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601682465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:37:55,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:37:55,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:37:55,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355223634] [2021-05-02 20:37:55,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:37:55,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:37:55,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:37:55,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:37:55,115 INFO L87 Difference]: Start difference. First operand 473 states and 625 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2021-05-02 20:38:00,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:38:00,429 INFO L93 Difference]: Finished difference Result 479 states and 630 transitions. [2021-05-02 20:38:00,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 20:38:00,430 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) Word has length 151 [2021-05-02 20:38:00,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:38:00,431 INFO L225 Difference]: With dead ends: 479 [2021-05-02 20:38:00,431 INFO L226 Difference]: Without dead ends: 479 [2021-05-02 20:38:00,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 896.6ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:38:00,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-05-02 20:38:00,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 477. [2021-05-02 20:38:00,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 261 states have (on average 1.1226053639846743) internal successors, (293), 264 states have internal predecessors, (293), 169 states have call successors, (169), 47 states have call predecessors, (169), 46 states have return successors, (166), 165 states have call predecessors, (166), 166 states have call successors, (166) [2021-05-02 20:38:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 628 transitions. [2021-05-02 20:38:00,439 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 628 transitions. Word has length 151 [2021-05-02 20:38:00,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:38:00,440 INFO L480 AbstractCegarLoop]: Abstraction has 477 states and 628 transitions. [2021-05-02 20:38:00,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 9 states have call successors, (26) [2021-05-02 20:38:00,440 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 628 transitions. [2021-05-02 20:38:00,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 20:38:00,441 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:38:00,441 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:38:00,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 20:38:00,656 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:38:00,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:38:00,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1866948721, now seen corresponding path program 9 times [2021-05-02 20:38:00,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:38:00,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479540288] [2021-05-02 20:38:00,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:38:00,661 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:38:00,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546826018] [2021-05-02 20:38:00,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:38:00,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:38:00,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:38:00,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 20:38:00,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:38:01,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:01,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 91 proven. 58 refuted. 0 times theorem prover too weak. 696 trivial. 0 not checked. [2021-05-02 20:38:01,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:38:01,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479540288] [2021-05-02 20:38:01,234 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:38:01,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546826018] [2021-05-02 20:38:01,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546826018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:38:01,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:38:01,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:38:01,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369801640] [2021-05-02 20:38:01,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:38:01,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:38:01,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:38:01,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:38:01,235 INFO L87 Difference]: Start difference. First operand 477 states and 628 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-05-02 20:38:07,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:38:07,846 INFO L93 Difference]: Finished difference Result 518 states and 681 transitions. [2021-05-02 20:38:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:38:07,848 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 154 [2021-05-02 20:38:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:38:07,849 INFO L225 Difference]: With dead ends: 518 [2021-05-02 20:38:07,849 INFO L226 Difference]: Without dead ends: 518 [2021-05-02 20:38:07,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 360.2ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:38:07,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-05-02 20:38:07,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 514. [2021-05-02 20:38:07,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 282 states have (on average 1.124113475177305) internal successors, (317), 285 states have internal predecessors, (317), 181 states have call successors, (181), 51 states have call predecessors, (181), 50 states have return successors, (178), 177 states have call predecessors, (178), 178 states have call successors, (178) [2021-05-02 20:38:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 676 transitions. [2021-05-02 20:38:07,858 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 676 transitions. Word has length 154 [2021-05-02 20:38:07,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:38:07,858 INFO L480 AbstractCegarLoop]: Abstraction has 514 states and 676 transitions. [2021-05-02 20:38:07,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2021-05-02 20:38:07,858 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 676 transitions. [2021-05-02 20:38:07,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 20:38:07,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:38:07,859 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:38:08,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:38:08,073 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:38:08,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:38:08,073 INFO L82 PathProgramCache]: Analyzing trace with hash 742722429, now seen corresponding path program 10 times [2021-05-02 20:38:08,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:38:08,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569882858] [2021-05-02 20:38:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:38:08,077 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:38:08,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269331643] [2021-05-02 20:38:08,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:38:08,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:38:08,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:38:08,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 119 conjunts are in the unsatisfiable core [2021-05-02 20:38:08,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:38:08,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:08,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:09,045 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-05-02 20:38:09,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:09,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:09,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:09,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:09,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:09,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:09,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:09,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:09,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:09,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:09,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:09,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:09,645 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-05-02 20:38:09,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:09,908 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-02 20:38:09,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:09,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:20,443 WARN L205 SmtUtils]: Spent 6.20 s on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 20:38:22,502 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_main_~y~0 c_main_~s~0)) (.cse4 (* c_main_~x~0 c_main_~q~0))) (let ((.cse0 (+ .cse3 .cse4 c_main_~c~0))) (and (= (* c_main_~y~0 c_main_~y~0) c_main_~yy~0) (= (* c_main_~x~0 c_main_~y~0) c_main_~xy~0) (<= 1 c_main_~x~0) (= c_main_~r~0 1) (= .cse0 (+ (* c_main_~y~0 c_main_~r~0) (* c_main_~x~0 c_main_~p~0))) (= (+ (* c_main_~xy~0 c_main_~q~0) (* c_main_~yy~0 c_main_~s~0)) (+ (* c_main_~x~0 c_main_~y~0 c_main_~q~0) (* c_main_~y~0 c_main_~y~0 c_main_~s~0))) (= c_main_~k~0 1) (= c_main_~q~0 1) (or (= .cse0 0) (let ((.cse1 (let ((.cse2 (+ c_main_~c~0 .cse3 .cse4))) (div .cse2 .cse2)))) (and (= (+ (* .cse1 c_main_~r~0) c_main_~s~0) 0) (< (* .cse1 c_main_~y~0 c_main_~r~0) (+ (* .cse1 c_main_~c~0) c_main_~c~0 (* .cse1 c_main_~x~0 c_main_~q~0) (* .cse1 c_main_~y~0 c_main_~s~0)))))) (< c_main_~c~0 (+ .cse3 .cse4)) (= .cse0 c_main_~y~0)))) is different from false [2021-05-02 20:39:06,073 WARN L205 SmtUtils]: Spent 43.38 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-05-02 20:39:06,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:06,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:06,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:06,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:06,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:06,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:06,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:06,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:39:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 198 proven. 181 refuted. 0 times theorem prover too weak. 465 trivial. 1 not checked. [2021-05-02 20:39:06,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:39:06,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569882858] [2021-05-02 20:39:06,317 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:39:06,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269331643] [2021-05-02 20:39:06,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269331643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:39:06,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:39:06,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-02 20:39:06,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130121700] [2021-05-02 20:39:06,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 20:39:06,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:39:06,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 20:39:06,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=394, Unknown=3, NotChecked=40, Total=506 [2021-05-02 20:39:06,318 INFO L87 Difference]: Start difference. First operand 514 states and 676 transitions. Second operand has 23 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 12 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2021-05-02 20:39:13,510 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-05-02 20:39:30,511 WARN L205 SmtUtils]: Spent 12.88 s on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-05-02 20:40:01,830 WARN L205 SmtUtils]: Spent 14.51 s on a formula simplification. DAG size of input: 92 DAG size of output: 54 [2021-05-02 20:40:04,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:40:04,989 INFO L93 Difference]: Finished difference Result 521 states and 682 transitions. [2021-05-02 20:40:04,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 20:40:04,991 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 12 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) Word has length 154 [2021-05-02 20:40:04,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:40:04,992 INFO L225 Difference]: With dead ends: 521 [2021-05-02 20:40:04,992 INFO L226 Difference]: Without dead ends: 521 [2021-05-02 20:40:04,993 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 106169.6ms TimeCoverageRelationStatistics Valid=118, Invalid=687, Unknown=11, NotChecked=54, Total=870 [2021-05-02 20:40:04,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-05-02 20:40:05,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 518. [2021-05-02 20:40:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 285 states have (on average 1.1228070175438596) internal successors, (320), 288 states have internal predecessors, (320), 181 states have call successors, (181), 52 states have call predecessors, (181), 51 states have return successors, (178), 177 states have call predecessors, (178), 178 states have call successors, (178) [2021-05-02 20:40:05,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 679 transitions. [2021-05-02 20:40:05,002 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 679 transitions. Word has length 154 [2021-05-02 20:40:05,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:40:05,002 INFO L480 AbstractCegarLoop]: Abstraction has 518 states and 679 transitions. [2021-05-02 20:40:05,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 12 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2021-05-02 20:40:05,002 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 679 transitions. [2021-05-02 20:40:05,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-02 20:40:05,003 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:40:05,003 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1] [2021-05-02 20:40:05,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 20:40:05,219 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:40:05,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:40:05,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1947214227, now seen corresponding path program 6 times [2021-05-02 20:40:05,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:40:05,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856734095] [2021-05-02 20:40:05,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:40:05,224 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:40:05,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519139444] [2021-05-02 20:40:05,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:40:05,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 20:40:05,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:40:05,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 20:40:05,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:40:05,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:05,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:06,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:06,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 96 proven. 34 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2021-05-02 20:40:06,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:40:06,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856734095] [2021-05-02 20:40:06,159 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:40:06,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519139444] [2021-05-02 20:40:06,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519139444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:40:06,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:40:06,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:40:06,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401395460] [2021-05-02 20:40:06,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:40:06,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:40:06,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:40:06,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:40:06,160 INFO L87 Difference]: Start difference. First operand 518 states and 679 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 20:40:11,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:40:11,017 INFO L93 Difference]: Finished difference Result 523 states and 683 transitions. [2021-05-02 20:40:11,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:40:11,026 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 157 [2021-05-02 20:40:11,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:40:11,027 INFO L225 Difference]: With dead ends: 523 [2021-05-02 20:40:11,027 INFO L226 Difference]: Without dead ends: 522 [2021-05-02 20:40:11,028 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 563.6ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:40:11,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-05-02 20:40:11,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 521. [2021-05-02 20:40:11,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 288 states have (on average 1.1180555555555556) internal successors, (322), 290 states have internal predecessors, (322), 180 states have call successors, (180), 53 states have call predecessors, (180), 52 states have return successors, (178), 177 states have call predecessors, (178), 178 states have call successors, (178) [2021-05-02 20:40:11,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 680 transitions. [2021-05-02 20:40:11,036 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 680 transitions. Word has length 157 [2021-05-02 20:40:11,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:40:11,036 INFO L480 AbstractCegarLoop]: Abstraction has 521 states and 680 transitions. [2021-05-02 20:40:11,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 20:40:11,037 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 680 transitions. [2021-05-02 20:40:11,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-02 20:40:11,038 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:40:11,038 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:40:11,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:40:11,253 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:40:11,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:40:11,253 INFO L82 PathProgramCache]: Analyzing trace with hash 915217378, now seen corresponding path program 7 times [2021-05-02 20:40:11,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:40:11,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071157071] [2021-05-02 20:40:11,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:40:11,258 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:40:11,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712776694] [2021-05-02 20:40:11,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:40:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:40:11,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 86 conjunts are in the unsatisfiable core [2021-05-02 20:40:11,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:40:11,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:11,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,258 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-05-02 20:40:12,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:12,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:13,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:13,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 142 proven. 133 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2021-05-02 20:40:13,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:40:13,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071157071] [2021-05-02 20:40:13,254 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:40:13,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712776694] [2021-05-02 20:40:13,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712776694] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:40:13,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:40:13,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 20:40:13,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852674600] [2021-05-02 20:40:13,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 20:40:13,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:40:13,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 20:40:13,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:40:13,255 INFO L87 Difference]: Start difference. First operand 521 states and 680 transitions. Second operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 12 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 11 states have call successors, (27) [2021-05-02 20:40:15,240 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-05-02 20:40:17,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:40:17,822 INFO L93 Difference]: Finished difference Result 568 states and 744 transitions. [2021-05-02 20:40:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:40:17,833 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 12 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 11 states have call successors, (27) Word has length 160 [2021-05-02 20:40:17,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:40:17,835 INFO L225 Difference]: With dead ends: 568 [2021-05-02 20:40:17,835 INFO L226 Difference]: Without dead ends: 568 [2021-05-02 20:40:17,835 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1651.1ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-05-02 20:40:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-05-02 20:40:17,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 565. [2021-05-02 20:40:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 311 states have (on average 1.1221864951768488) internal successors, (349), 314 states have internal predecessors, (349), 197 states have call successors, (197), 57 states have call predecessors, (197), 56 states have return successors, (195), 193 states have call predecessors, (195), 195 states have call successors, (195) [2021-05-02 20:40:17,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 741 transitions. [2021-05-02 20:40:17,844 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 741 transitions. Word has length 160 [2021-05-02 20:40:17,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:40:17,844 INFO L480 AbstractCegarLoop]: Abstraction has 565 states and 741 transitions. [2021-05-02 20:40:17,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 17 states have internal predecessors, (38), 12 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 8 states have call predecessors, (27), 11 states have call successors, (27) [2021-05-02 20:40:17,845 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 741 transitions. [2021-05-02 20:40:17,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-02 20:40:17,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:40:17,846 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:40:18,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 20:40:18,076 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:40:18,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:40:18,076 INFO L82 PathProgramCache]: Analyzing trace with hash -970371602, now seen corresponding path program 8 times [2021-05-02 20:40:18,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:40:18,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621491409] [2021-05-02 20:40:18,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:40:18,080 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:40:18,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845959708] [2021-05-02 20:40:18,080 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:40:18,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:40:18,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:40:18,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 97 conjunts are in the unsatisfiable core [2021-05-02 20:40:18,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:40:18,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:18,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:19,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:19,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:19,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:19,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:19,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:19,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:19,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:19,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:19,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:19,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:19,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:19,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:21,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:21,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:21,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:21,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:21,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:21,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:21,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:21,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:21,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:22,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:22,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:22,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 147 proven. 167 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2021-05-02 20:40:22,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:40:22,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621491409] [2021-05-02 20:40:22,286 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:40:22,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845959708] [2021-05-02 20:40:22,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845959708] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:40:22,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:40:22,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 20:40:22,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590288384] [2021-05-02 20:40:22,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 20:40:22,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:40:22,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 20:40:22,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:40:22,287 INFO L87 Difference]: Start difference. First operand 565 states and 741 transitions. Second operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2021-05-02 20:40:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:40:24,839 INFO L93 Difference]: Finished difference Result 609 states and 803 transitions. [2021-05-02 20:40:24,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 20:40:24,846 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) Word has length 160 [2021-05-02 20:40:24,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:40:24,848 INFO L225 Difference]: With dead ends: 609 [2021-05-02 20:40:24,848 INFO L226 Difference]: Without dead ends: 609 [2021-05-02 20:40:24,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1698.1ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-05-02 20:40:24,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-05-02 20:40:24,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 605. [2021-05-02 20:40:24,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 331 states have (on average 1.1268882175226587) internal successors, (373), 335 states have internal predecessors, (373), 214 states have call successors, (214), 60 states have call predecessors, (214), 59 states have return successors, (212), 209 states have call predecessors, (212), 212 states have call successors, (212) [2021-05-02 20:40:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 799 transitions. [2021-05-02 20:40:24,859 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 799 transitions. Word has length 160 [2021-05-02 20:40:24,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:40:24,859 INFO L480 AbstractCegarLoop]: Abstraction has 605 states and 799 transitions. [2021-05-02 20:40:24,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 10 states have call successors, (27) [2021-05-02 20:40:24,859 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 799 transitions. [2021-05-02 20:40:24,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-02 20:40:24,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:40:24,861 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:40:25,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 20:40:25,085 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:40:25,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:40:25,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1350776060, now seen corresponding path program 2 times [2021-05-02 20:40:25,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:40:25,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319566127] [2021-05-02 20:40:25,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:40:25,097 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:40:25,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700756077] [2021-05-02 20:40:25,097 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:40:25,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:40:25,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:40:25,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:40:25,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:40:25,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:25,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:40:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 77 proven. 107 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2021-05-02 20:40:26,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:40:26,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319566127] [2021-05-02 20:40:26,469 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:40:26,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700756077] [2021-05-02 20:40:26,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700756077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:40:26,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:40:26,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 20:40:26,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119077763] [2021-05-02 20:40:26,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 20:40:26,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:40:26,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 20:40:26,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:40:26,471 INFO L87 Difference]: Start difference. First operand 605 states and 799 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-02 20:40:28,363 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-05-02 20:40:28,597 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-05-02 20:40:28,848 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-02 20:40:29,671 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-05-02 20:40:30,033 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-02 20:40:30,261 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-02 20:40:30,948 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-02 20:40:31,132 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-05-02 20:40:32,133 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-05-02 20:40:33,271 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-05-02 20:40:33,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:40:33,275 INFO L93 Difference]: Finished difference Result 717 states and 979 transitions. [2021-05-02 20:40:33,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 20:40:33,278 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 165 [2021-05-02 20:40:33,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:40:33,284 INFO L225 Difference]: With dead ends: 717 [2021-05-02 20:40:33,284 INFO L226 Difference]: Without dead ends: 715 [2021-05-02 20:40:33,284 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 3859.0ms TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 20:40:33,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-05-02 20:40:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 682. [2021-05-02 20:40:33,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 364 states have (on average 1.14010989010989) internal successors, (415), 369 states have internal predecessors, (415), 257 states have call successors, (257), 61 states have call predecessors, (257), 60 states have return successors, (254), 251 states have call predecessors, (254), 254 states have call successors, (254) [2021-05-02 20:40:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 926 transitions. [2021-05-02 20:40:33,297 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 926 transitions. Word has length 165 [2021-05-02 20:40:33,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:40:33,297 INFO L480 AbstractCegarLoop]: Abstraction has 682 states and 926 transitions. [2021-05-02 20:40:33,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-02 20:40:33,298 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 926 transitions. [2021-05-02 20:40:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-02 20:40:33,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:40:33,299 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:40:33,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:40:33,513 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:40:33,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:40:33,513 INFO L82 PathProgramCache]: Analyzing trace with hash -399900552, now seen corresponding path program 3 times [2021-05-02 20:40:33,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:40:33,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063795514] [2021-05-02 20:40:33,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:40:33,518 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:40:33,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552722197] [2021-05-02 20:40:33,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:41:27,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:41:27,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:41:27,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-02 20:41:27,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:41:27,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:27,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,622 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 20:41:31,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:33,926 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 20:41:38,109 WARN L205 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-02 20:41:40,219 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 20:41:40,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:40,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,497 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 20:41:42,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:42,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:45,277 WARN L205 SmtUtils]: Spent 2.38 s on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 20:41:58,920 WARN L205 SmtUtils]: Spent 11.23 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 20:42:19,378 WARN L205 SmtUtils]: Spent 11.22 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 20:42:36,904 WARN L205 SmtUtils]: Spent 12.27 s on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 20:42:36,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:36,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:37,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:37,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:37,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:37,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,229 WARN L205 SmtUtils]: Spent 8.78 s on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 20:42:50,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:50,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:52,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:15,513 WARN L205 SmtUtils]: Spent 10.42 s on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 20:43:15,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:15,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:17,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:19,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:33,281 WARN L205 SmtUtils]: Spent 10.17 s on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 20:43:33,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:33,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:35,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:37,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:39,464 WARN L838 $PredicateComparison]: unable to prove that (exists ((main_~q~0 Int) (v_main_~y~0_BEFORE_CALL_419 Int) (v_main_~x~0_BEFORE_CALL_475 Int) (v_main_~r~0_BEFORE_CALL_326 Int) (v_main_~a~0_BEFORE_CALL_207 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_419 v_main_~r~0_BEFORE_CALL_326))) (and (<= v_main_~x~0_BEFORE_CALL_475 50) (= (+ (* main_~q~0 v_main_~y~0_BEFORE_CALL_419 v_main_~r~0_BEFORE_CALL_326) (* main_~q~0 v_main_~x~0_BEFORE_CALL_475) v_main_~y~0_BEFORE_CALL_419) 0) (<= 0 v_main_~x~0_BEFORE_CALL_475) (= (+ (* v_main_~y~0_BEFORE_CALL_419 v_main_~a~0_BEFORE_CALL_207) v_main_~x~0_BEFORE_CALL_475 .cse0) (+ (* v_main_~y~0_BEFORE_CALL_419 v_main_~y~0_BEFORE_CALL_419 v_main_~r~0_BEFORE_CALL_326) (* v_main_~x~0_BEFORE_CALL_475 v_main_~y~0_BEFORE_CALL_419) v_main_~a~0_BEFORE_CALL_207)) (not (= (+ v_main_~x~0_BEFORE_CALL_475 .cse0) v_main_~a~0_BEFORE_CALL_207)) (< 0 v_main_~a~0_BEFORE_CALL_207) (< (* v_main_~y~0_BEFORE_CALL_419 v_main_~y~0_BEFORE_CALL_419) 2147483647) (< v_main_~a~0_BEFORE_CALL_207 v_main_~y~0_BEFORE_CALL_419)))) is different from false [2021-05-02 20:43:41,471 WARN L860 $PredicateComparison]: unable to prove that (exists ((main_~q~0 Int) (v_main_~y~0_BEFORE_CALL_419 Int) (v_main_~x~0_BEFORE_CALL_475 Int) (v_main_~r~0_BEFORE_CALL_326 Int) (v_main_~a~0_BEFORE_CALL_207 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_419 v_main_~r~0_BEFORE_CALL_326))) (and (<= v_main_~x~0_BEFORE_CALL_475 50) (= (+ (* main_~q~0 v_main_~y~0_BEFORE_CALL_419 v_main_~r~0_BEFORE_CALL_326) (* main_~q~0 v_main_~x~0_BEFORE_CALL_475) v_main_~y~0_BEFORE_CALL_419) 0) (<= 0 v_main_~x~0_BEFORE_CALL_475) (= (+ (* v_main_~y~0_BEFORE_CALL_419 v_main_~a~0_BEFORE_CALL_207) v_main_~x~0_BEFORE_CALL_475 .cse0) (+ (* v_main_~y~0_BEFORE_CALL_419 v_main_~y~0_BEFORE_CALL_419 v_main_~r~0_BEFORE_CALL_326) (* v_main_~x~0_BEFORE_CALL_475 v_main_~y~0_BEFORE_CALL_419) v_main_~a~0_BEFORE_CALL_207)) (not (= (+ v_main_~x~0_BEFORE_CALL_475 .cse0) v_main_~a~0_BEFORE_CALL_207)) (< 0 v_main_~a~0_BEFORE_CALL_207) (< (* v_main_~y~0_BEFORE_CALL_419 v_main_~y~0_BEFORE_CALL_419) 2147483647) (< v_main_~a~0_BEFORE_CALL_207 v_main_~y~0_BEFORE_CALL_419)))) is different from true [2021-05-02 20:43:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 176 proven. 57 refuted. 2 times theorem prover too weak. 774 trivial. 0 not checked. [2021-05-02 20:43:41,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:43:41,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063795514] [2021-05-02 20:43:41,472 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:43:41,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552722197] [2021-05-02 20:43:41,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552722197] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:43:41,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:43:41,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 20:43:41,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296058365] [2021-05-02 20:43:41,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 20:43:41,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:43:41,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 20:43:41,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=337, Unknown=16, NotChecked=38, Total=462 [2021-05-02 20:43:41,473 INFO L87 Difference]: Start difference. First operand 682 states and 926 transitions. Second operand has 22 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 20:44:07,238 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 44 DAG size of output: 6 [2021-05-02 20:44:20,200 WARN L205 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-02 20:44:35,632 WARN L205 SmtUtils]: Spent 6.99 s on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-05-02 20:44:37,684 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (and (= .cse0 c_main_~yy~0) (= c_main_~p~0 0) (= c_main_~r~0 1) (<= 0 c_main_~c~0) (<= c_main_~x~0 50) (= c_main_~q~0 1) (< c_main_~yy~0 2147483647) (= (* c_main_~x~0 c_main_~y~0) c_main_~xy~0) (< .cse0 2147483647) (< c_main_~c~0 c_main_~b~0) (<= 0 c_main_~x~0) (< c_main_~b~0 c_main_~y~0) (< c_main_~b~0 c_main_~a~0) (= (+ (* c_main_~y~0 c_main_~s~0) (* c_main_~y~0 c_main_~b~0) (* c_main_~x~0 c_main_~q~0)) (+ (* c_main_~x~0 c_main_~y~0 c_main_~q~0) c_main_~b~0 (* c_main_~y~0 c_main_~y~0 c_main_~s~0))) (= c_main_~a~0 c_main_~y~0))) is different from false [2021-05-02 20:45:27,444 WARN L838 $PredicateComparison]: unable to prove that (and (= (+ c_main_~x~0 (* c_main_~y~0 c_main_~r~0) (* c_main_~y~0 c_main_~a~0)) (+ (* c_main_~x~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~r~0) c_main_~a~0)) (< (* c_main_~y~0 c_main_~y~0) 2147483647) (< c_main_~a~0 c_main_~y~0) (<= 0 c_main_~x~0) (= c_main_~s~0 (+ (* c_main_~q~0 c_main_~r~0) 1)) (<= c_main_~x~0 50) (< c_main_~b~0 c_main_~a~0) (<= 0 c_main_~b~0) (= c_main_~p~0 1) (< 0 c_main_~a~0) (exists ((main_~q~0 Int)) (= (+ c_main_~y~0 (* c_main_~x~0 main_~q~0) (* c_main_~y~0 main_~q~0 c_main_~r~0)) 0))) is different from false