/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_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:22:49,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:22:49,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:22:49,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:22:49,406 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:22:49,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:22:49,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:22:49,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:22:49,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:22:49,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:22:49,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:22:49,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:22:49,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:22:49,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:22:49,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:22:49,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:22:49,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:22:49,431 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:22:49,433 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:22:49,438 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:22:49,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:22:49,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:22:49,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:22:49,442 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:22:49,448 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:22:49,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:22:49,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:22:49,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:22:49,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:22:49,478 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:22:49,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:22:49,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:22:49,481 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:22:49,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:22:49,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:22:49,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:22:49,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:22:49,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:22:49,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:22:49,483 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:22:49,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:22:49,484 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:22:49,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:22:49,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:22:49,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:22:49,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:22:49,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:22:49,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:22:49,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:22:49,485 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:22:49,486 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:22:49,486 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:22:49,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:22:49,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:22:49,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:22:49,829 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:22:49,832 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:22:49,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c [2021-05-02 20:22:49,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e20a17c6/1bacd170269a483881d4453e39aea1af/FLAGba3f89330 [2021-05-02 20:22:50,717 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:22:50,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound10.c [2021-05-02 20:22:50,726 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e20a17c6/1bacd170269a483881d4453e39aea1af/FLAGba3f89330 [2021-05-02 20:22:50,934 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e20a17c6/1bacd170269a483881d4453e39aea1af [2021-05-02 20:22:50,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:22:50,938 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:22:50,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:22:50,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:22:50,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:22:50,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:22:50" (1/1) ... [2021-05-02 20:22:50,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a2290cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:50, skipping insertion in model container [2021-05-02 20:22:50,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:22:50" (1/1) ... [2021-05-02 20:22:50,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:22:50,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:22:51,105 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_valuebound10.c[490,503] [2021-05-02 20:22:51,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:22:51,181 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:22:51,204 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_valuebound10.c[490,503] [2021-05-02 20:22:51,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:22:51,230 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:22:51,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:51 WrapperNode [2021-05-02 20:22:51,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:22:51,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:22:51,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:22:51,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:22:51,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:51" (1/1) ... [2021-05-02 20:22:51,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:51" (1/1) ... [2021-05-02 20:22:51,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:51" (1/1) ... [2021-05-02 20:22:51,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:51" (1/1) ... [2021-05-02 20:22:51,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:51" (1/1) ... [2021-05-02 20:22:51,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:51" (1/1) ... [2021-05-02 20:22:51,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:51" (1/1) ... [2021-05-02 20:22:51,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:22:51,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:22:51,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:22:51,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:22:51,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:51" (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 20:22:51,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:22:51,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:22:51,312 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:22:51,312 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:22:51,312 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:22:51,312 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:22:51,312 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:22:51,312 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:22:51,313 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:22:51,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:22:51,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:22:51,313 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:22:51,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:22:51,313 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:22:51,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:22:51,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:22:51,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:22:51,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:22:51,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:22:51,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:22:51,523 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:22:51,523 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:22:51,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:22:51 BoogieIcfgContainer [2021-05-02 20:22:51,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:22:51,525 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:22:51,525 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:22:51,526 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:22:51,528 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:22:51" (1/1) ... [2021-05-02 20:22:51,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:22:51 BasicIcfg [2021-05-02 20:22:51,544 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:22:51,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:22:51,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:22:51,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:22:51,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:22:50" (1/4) ... [2021-05-02 20:22:51,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ee58a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:22:51, skipping insertion in model container [2021-05-02 20:22:51,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:22:51" (2/4) ... [2021-05-02 20:22:51,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ee58a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:22:51, skipping insertion in model container [2021-05-02 20:22:51,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:22:51" (3/4) ... [2021-05-02 20:22:51,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ee58a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:22:51, skipping insertion in model container [2021-05-02 20:22:51,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:22:51" (4/4) ... [2021-05-02 20:22:51,549 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.cJordan [2021-05-02 20:22:51,553 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:22:51,556 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:22:51,568 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:22:51,582 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:22:51,583 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:22:51,583 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:22:51,583 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:22:51,583 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:22:51,583 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:22:51,583 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:22:51,583 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:22:51,605 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 20:22:51,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:22:51,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:22:51,612 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 20:22:51,612 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:22:51,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:22:51,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2021-05-02 20:22:51,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:22:51,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007466794] [2021-05-02 20:22:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:22:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:51,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:22:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:51,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:22:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:51,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:22:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:51,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:22:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:51,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:22:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:51,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-02 20:22:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:51,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 20:22:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:51,973 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 20:22:51,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:22:51,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007466794] [2021-05-02 20:22:51,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007466794] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:22:51,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:22:51,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:22:51,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220024798] [2021-05-02 20:22:51,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:22:51,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:22:52,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:22:52,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:22:52,011 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 20:22:52,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:22:52,132 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-02 20:22:52,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:22:52,135 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 20:22:52,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:22:52,141 INFO L225 Difference]: With dead ends: 40 [2021-05-02 20:22:52,141 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:22:52,142 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:22:52,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:22:52,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 20:22:52,174 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 20:22:52,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-02 20:22:52,178 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-02 20:22:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:22:52,179 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-02 20:22:52,179 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 20:22:52,179 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-02 20:22:52,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 20:22:52,181 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:22:52,181 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 20:22:52,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:22:52,182 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:22:52,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:22:52,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2021-05-02 20:22:52,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:22:52,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808619440] [2021-05-02 20:22:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:22:52,215 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:22:52,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554192145] [2021-05-02 20:22:52,217 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 20:22:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:52,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:22:52,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:22:52,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:52,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:52,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:52,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:52,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:52,433 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 20:22:52,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:22:52,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808619440] [2021-05-02 20:22:52,433 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:22:52,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554192145] [2021-05-02 20:22:52,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554192145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:22:52,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:22:52,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:22:52,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48023668] [2021-05-02 20:22:52,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:22:52,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:22:52,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:22:52,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:22:52,436 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 20:22:52,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:22:52,513 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-05-02 20:22:52,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:22:52,514 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 20:22:52,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:22:52,515 INFO L225 Difference]: With dead ends: 44 [2021-05-02 20:22:52,515 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 20:22:52,516 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:22:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 20:22:52,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 20:22:52,521 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 20:22:52,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-02 20:22:52,523 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-02 20:22:52,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:22:52,523 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-02 20:22:52,523 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 20:22:52,523 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-02 20:22:52,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 20:22:52,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:22:52,525 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 20:22:52,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:22:52,747 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:22:52,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:22:52,748 INFO L82 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2021-05-02 20:22:52,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:22:52,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117459360] [2021-05-02 20:22:52,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:22:52,778 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:22:52,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376821814] [2021-05-02 20:22:52,779 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 20:22:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:52,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:22:52,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:22:52,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:52,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:52,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:52,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:52,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:52,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:52,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:52,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:53,011 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 20:22:53,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:22:53,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117459360] [2021-05-02 20:22:53,012 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:22:53,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376821814] [2021-05-02 20:22:53,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376821814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:22:53,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:22:53,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:22:53,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121396423] [2021-05-02 20:22:53,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:22:53,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:22:53,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:22:53,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:22:53,015 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 20:22:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:22:53,158 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-05-02 20:22:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:22:53,159 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 20:22:53,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:22:53,162 INFO L225 Difference]: With dead ends: 55 [2021-05-02 20:22:53,162 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 20:22:53,162 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:22:53,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 20:22:53,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-02 20:22:53,175 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 20:22:53,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-02 20:22:53,178 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-02 20:22:53,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:22:53,178 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-02 20:22:53,178 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 20:22:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-02 20:22:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 20:22:53,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:22:53,180 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 20:22:53,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:22:53,381 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:22:53,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:22:53,382 INFO L82 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2021-05-02 20:22:53,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:22:53,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982605600] [2021-05-02 20:22:53,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:22:53,395 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:22:53,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776428460] [2021-05-02 20:22:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:22:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:53,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:22:53,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:22:53,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:53,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:53,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:53,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:53,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:53,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:53,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:53,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:53,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:53,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:53,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:53,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:53,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:53,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:53,674 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 20:22:53,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:22:53,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982605600] [2021-05-02 20:22:53,675 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:22:53,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776428460] [2021-05-02 20:22:53,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776428460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:22:53,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:22:53,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:22:53,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377386577] [2021-05-02 20:22:53,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:22:53,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:22:53,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:22:53,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:22:53,677 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 20:22:53,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:22:53,837 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-02 20:22:53,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:22:53,838 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 20:22:53,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:22:53,841 INFO L225 Difference]: With dead ends: 54 [2021-05-02 20:22:53,841 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 20:22:53,841 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:22:53,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 20:22:53,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 20:22:53,845 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 20:22:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-02 20:22:53,846 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-02 20:22:53,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:22:53,847 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-02 20:22:53,847 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 20:22:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-02 20:22:53,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 20:22:53,848 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:22:53,848 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 20:22:54,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:22:54,069 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:22:54,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:22:54,070 INFO L82 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2021-05-02 20:22:54,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:22:54,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638859551] [2021-05-02 20:22:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:22:54,082 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:22:54,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970987349] [2021-05-02 20:22:54,083 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 20:22:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:54,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:22:54,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:22:54,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,323 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 20:22:54,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:22:54,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638859551] [2021-05-02 20:22:54,324 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:22:54,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970987349] [2021-05-02 20:22:54,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970987349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:22:54,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:22:54,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:22:54,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568496201] [2021-05-02 20:22:54,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:22:54,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:22:54,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:22:54,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:22:54,325 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 20:22:54,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:22:54,461 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2021-05-02 20:22:54,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:22:54,462 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 20:22:54,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:22:54,463 INFO L225 Difference]: With dead ends: 58 [2021-05-02 20:22:54,463 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:22:54,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:22:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:22:54,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 20:22:54,468 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 20:22:54,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-02 20:22:54,469 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-02 20:22:54,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:22:54,469 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-02 20:22:54,469 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 20:22:54,469 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-02 20:22:54,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 20:22:54,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:22:54,470 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 20:22:54,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:22:54,671 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:22:54,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:22:54,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2021-05-02 20:22:54,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:22:54,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205993832] [2021-05-02 20:22:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:22:54,686 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:22:54,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034305499] [2021-05-02 20:22:54,686 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 20:22:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:54,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:22:54,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:22:54,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:54,968 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 20:22:54,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:22:54,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205993832] [2021-05-02 20:22:54,969 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:22:54,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034305499] [2021-05-02 20:22:54,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034305499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:22:54,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:22:54,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:22:54,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156959038] [2021-05-02 20:22:54,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:22:54,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:22:54,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:22:54,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:22:54,971 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 20:22:59,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:22:59,219 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-05-02 20:22:59,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:22:59,220 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 20:22:59,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:22:59,220 INFO L225 Difference]: With dead ends: 62 [2021-05-02 20:22:59,221 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 20:22:59,221 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:22:59,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 20:22:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 20:22:59,225 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 20:22:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-02 20:22:59,225 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-02 20:22:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:22:59,226 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-02 20:22:59,226 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 20:22:59,226 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-02 20:22:59,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 20:22:59,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:22:59,227 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 20:22:59,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:22:59,449 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:22:59,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:22:59,449 INFO L82 PathProgramCache]: Analyzing trace with hash 14033329, now seen corresponding path program 1 times [2021-05-02 20:22:59,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:22:59,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548751112] [2021-05-02 20:22:59,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:22:59,459 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:22:59,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769166266] [2021-05-02 20:22:59,460 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 20:22:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:22:59,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:22:59,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:22:59,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:22:59,681 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 20:22:59,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:22:59,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548751112] [2021-05-02 20:22:59,682 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:22:59,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769166266] [2021-05-02 20:22:59,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769166266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:22:59,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:22:59,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:22:59,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381244743] [2021-05-02 20:22:59,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:22:59,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:22:59,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:22:59,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:22:59,683 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 20:22:59,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:22:59,819 INFO L93 Difference]: Finished difference Result 89 states and 120 transitions. [2021-05-02 20:22:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:22:59,820 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 20:22:59,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:22:59,821 INFO L225 Difference]: With dead ends: 89 [2021-05-02 20:22:59,821 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 20:22:59,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:22:59,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 20:22:59,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-05-02 20:22:59,827 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 20:22:59,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 20:22:59,828 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 67 [2021-05-02 20:22:59,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:22:59,829 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 20:22:59,829 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 20:22:59,829 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 20:22:59,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:22:59,830 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:22:59,830 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 20:23:00,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:00,045 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:00,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:00,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2021-05-02 20:23:00,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:00,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110880940] [2021-05-02 20:23:00,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:00,053 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:00,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262329597] [2021-05-02 20:23:00,053 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 20:23:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:23:00,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:23:00,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:00,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,298 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 20:23:00,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:00,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110880940] [2021-05-02 20:23:00,298 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:00,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262329597] [2021-05-02 20:23:00,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262329597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:00,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:00,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:23:00,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964875258] [2021-05-02 20:23:00,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:23:00,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:00,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:23:00,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:23:00,301 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 20:23:00,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:00,469 INFO L93 Difference]: Finished difference Result 116 states and 163 transitions. [2021-05-02 20:23:00,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:23:00,470 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 20:23:00,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:00,471 INFO L225 Difference]: With dead ends: 116 [2021-05-02 20:23:00,471 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:23:00,472 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 81.6ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:23:00,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:23:00,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2021-05-02 20:23:00,480 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 20:23:00,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 145 transitions. [2021-05-02 20:23:00,481 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 145 transitions. Word has length 69 [2021-05-02 20:23:00,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:00,481 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 145 transitions. [2021-05-02 20:23:00,481 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 20:23:00,481 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 145 transitions. [2021-05-02 20:23:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 20:23:00,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:00,483 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 20:23:00,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:00,697 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:00,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:00,697 INFO L82 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2021-05-02 20:23:00,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:00,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042929524] [2021-05-02 20:23:00,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:00,707 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:00,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704482259] [2021-05-02 20:23:00,708 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 20:23:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:23:00,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:23:00,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:00,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:00,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,060 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 20:23:01,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:01,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042929524] [2021-05-02 20:23:01,061 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:01,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704482259] [2021-05-02 20:23:01,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704482259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:01,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:01,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:23:01,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80756844] [2021-05-02 20:23:01,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:23:01,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:01,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:23:01,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:23:01,063 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 20:23:01,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:01,343 INFO L93 Difference]: Finished difference Result 148 states and 211 transitions. [2021-05-02 20:23:01,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:23:01,343 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 20:23:01,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:01,345 INFO L225 Difference]: With dead ends: 148 [2021-05-02 20:23:01,345 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 20:23:01,345 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:23:01,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 20:23:01,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-05-02 20:23:01,354 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 20:23:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 206 transitions. [2021-05-02 20:23:01,356 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 206 transitions. Word has length 75 [2021-05-02 20:23:01,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:01,356 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 206 transitions. [2021-05-02 20:23:01,356 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 20:23:01,356 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 206 transitions. [2021-05-02 20:23:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 20:23:01,357 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:01,357 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 20:23:01,578 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:23:01,579 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:01,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:01,579 INFO L82 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2021-05-02 20:23:01,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:01,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787660275] [2021-05-02 20:23:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:01,601 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:01,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829158595] [2021-05-02 20:23:01,602 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 20:23:01,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:23:01,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:01,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 20:23:01,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:01,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:01,950 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 20:23:01,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:01,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787660275] [2021-05-02 20:23:01,950 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:01,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829158595] [2021-05-02 20:23:01,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829158595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:01,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:01,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:23:01,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271692932] [2021-05-02 20:23:01,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:23:01,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:01,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:23:01,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:23:01,952 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 20:23:02,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:02,185 INFO L93 Difference]: Finished difference Result 150 states and 211 transitions. [2021-05-02 20:23:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:23:02,186 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 20:23:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:02,188 INFO L225 Difference]: With dead ends: 150 [2021-05-02 20:23:02,188 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 20:23:02,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:23:02,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 20:23:02,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-05-02 20:23:02,196 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 20:23:02,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 209 transitions. [2021-05-02 20:23:02,198 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 209 transitions. Word has length 80 [2021-05-02 20:23:02,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:02,198 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 209 transitions. [2021-05-02 20:23:02,198 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 20:23:02,198 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 209 transitions. [2021-05-02 20:23:02,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 20:23:02,199 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:02,199 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 20:23:02,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:02,421 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:02,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:02,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2021-05-02 20:23:02,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:02,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510644798] [2021-05-02 20:23:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:02,432 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:02,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400483965] [2021-05-02 20:23:02,432 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 20:23:02,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:23:02,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:02,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 20:23:02,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:02,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:02,909 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 20:23:02,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:02,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510644798] [2021-05-02 20:23:02,909 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:02,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400483965] [2021-05-02 20:23:02,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400483965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:02,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:02,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:23:02,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073142987] [2021-05-02 20:23:02,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:23:02,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:02,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:23:02,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:23:02,911 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 20:23:03,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:03,342 INFO L93 Difference]: Finished difference Result 154 states and 214 transitions. [2021-05-02 20:23:03,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:23:03,343 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 20:23:03,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:03,344 INFO L225 Difference]: With dead ends: 154 [2021-05-02 20:23:03,344 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 20:23:03,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:23:03,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 20:23:03,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-05-02 20:23:03,350 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 20:23:03,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 212 transitions. [2021-05-02 20:23:03,352 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 212 transitions. Word has length 85 [2021-05-02 20:23:03,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:03,352 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 212 transitions. [2021-05-02 20:23:03,352 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 20:23:03,352 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 212 transitions. [2021-05-02 20:23:03,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:23:03,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:03,353 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 20:23:03,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:03,575 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:03,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:03,576 INFO L82 PathProgramCache]: Analyzing trace with hash 583225195, now seen corresponding path program 2 times [2021-05-02 20:23:03,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:03,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710934807] [2021-05-02 20:23:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:03,587 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:03,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097072187] [2021-05-02 20:23:03,587 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 20:23:03,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:23:03,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:03,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 20:23:03,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:03,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:03,885 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 20:23:03,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:03,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710934807] [2021-05-02 20:23:03,885 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:03,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097072187] [2021-05-02 20:23:03,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097072187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:03,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:03,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:23:03,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512769830] [2021-05-02 20:23:03,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:23:03,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:03,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:23:03,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:23:03,887 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 20:23:04,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:04,184 INFO L93 Difference]: Finished difference Result 213 states and 317 transitions. [2021-05-02 20:23:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:23:04,185 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 20:23:04,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:04,186 INFO L225 Difference]: With dead ends: 213 [2021-05-02 20:23:04,186 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 20:23:04,186 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:23:04,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 20:23:04,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 186. [2021-05-02 20:23:04,194 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 20:23:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 270 transitions. [2021-05-02 20:23:04,196 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 270 transitions. Word has length 89 [2021-05-02 20:23:04,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:04,196 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 270 transitions. [2021-05-02 20:23:04,196 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 20:23:04,197 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 270 transitions. [2021-05-02 20:23:04,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 20:23:04,197 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:04,197 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 20:23:04,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:23:04,420 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:04,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:04,420 INFO L82 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2021-05-02 20:23:04,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:04,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239598039] [2021-05-02 20:23:04,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:04,435 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:04,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748732667] [2021-05-02 20:23:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:23:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:23:04,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 20:23:04,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:04,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:04,992 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 20:23:04,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:04,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239598039] [2021-05-02 20:23:04,993 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:04,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748732667] [2021-05-02 20:23:04,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748732667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:04,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:04,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 20:23:04,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127715111] [2021-05-02 20:23:04,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 20:23:04,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:04,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 20:23:04,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:23:04,995 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 20:23:05,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:05,462 INFO L93 Difference]: Finished difference Result 219 states and 318 transitions. [2021-05-02 20:23:05,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:23:05,463 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 20:23:05,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:05,464 INFO L225 Difference]: With dead ends: 219 [2021-05-02 20:23:05,464 INFO L226 Difference]: Without dead ends: 218 [2021-05-02 20:23:05,465 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 346.2ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:23:05,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-02 20:23:05,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-05-02 20:23:05,480 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 20:23:05,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 315 transitions. [2021-05-02 20:23:05,483 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 315 transitions. Word has length 91 [2021-05-02 20:23:05,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:05,485 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 315 transitions. [2021-05-02 20:23:05,485 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 20:23:05,485 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 315 transitions. [2021-05-02 20:23:05,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 20:23:05,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:05,486 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 20:23:05,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:23:05,687 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:05,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:05,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1735983139, now seen corresponding path program 4 times [2021-05-02 20:23:05,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:05,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678696125] [2021-05-02 20:23:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:05,703 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:05,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630119162] [2021-05-02 20:23:05,703 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 20:23:05,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:23:05,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:05,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:23:05,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:05,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:05,950 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 20:23:05,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:05,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678696125] [2021-05-02 20:23:05,950 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:05,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630119162] [2021-05-02 20:23:05,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630119162] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:23:05,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:23:05,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:23:05,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712808003] [2021-05-02 20:23:05,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:23:05,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:05,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:23:05,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:23:05,951 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 20:23:06,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:06,016 INFO L93 Difference]: Finished difference Result 194 states and 271 transitions. [2021-05-02 20:23:06,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:23:06,016 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 20:23:06,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:06,018 INFO L225 Difference]: With dead ends: 194 [2021-05-02 20:23:06,018 INFO L226 Difference]: Without dead ends: 194 [2021-05-02 20:23:06,018 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:23:06,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-02 20:23:06,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 185. [2021-05-02 20:23:06,025 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 20:23:06,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 257 transitions. [2021-05-02 20:23:06,026 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 257 transitions. Word has length 100 [2021-05-02 20:23:06,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:06,026 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 257 transitions. [2021-05-02 20:23:06,026 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 20:23:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 257 transitions. [2021-05-02 20:23:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 20:23:06,028 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:06,028 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 20:23:06,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:23:06,242 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:06,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:06,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2021-05-02 20:23:06,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:06,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916482880] [2021-05-02 20:23:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:06,250 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:06,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949600119] [2021-05-02 20:23:06,250 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 20:23:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:23:06,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 20:23:06,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:06,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:06,908 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 20:23:06,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:06,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916482880] [2021-05-02 20:23:06,909 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:06,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949600119] [2021-05-02 20:23:06,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949600119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:06,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:06,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:23:06,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438137954] [2021-05-02 20:23:06,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:23:06,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:06,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:23:06,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:23:06,910 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 20:23:11,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:11,470 INFO L93 Difference]: Finished difference Result 190 states and 261 transitions. [2021-05-02 20:23:11,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:23:11,471 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 20:23:11,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:11,472 INFO L225 Difference]: With dead ends: 190 [2021-05-02 20:23:11,472 INFO L226 Difference]: Without dead ends: 190 [2021-05-02 20:23:11,473 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 472.5ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:23:11,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-02 20:23:11,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 158. [2021-05-02 20:23:11,478 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 20:23:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 216 transitions. [2021-05-02 20:23:11,479 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 216 transitions. Word has length 107 [2021-05-02 20:23:11,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:11,480 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 216 transitions. [2021-05-02 20:23:11,480 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 20:23:11,480 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 216 transitions. [2021-05-02 20:23:11,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 20:23:11,481 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:11,481 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 20:23:11,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:11,697 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:11,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:11,697 INFO L82 PathProgramCache]: Analyzing trace with hash 82449829, now seen corresponding path program 3 times [2021-05-02 20:23:11,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:11,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400505922] [2021-05-02 20:23:11,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:11,706 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:11,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909159455] [2021-05-02 20:23:11,706 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 20:23:11,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:23:11,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:11,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:23:11,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:11,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:11,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:11,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:11,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,057 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 20:23:12,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:12,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400505922] [2021-05-02 20:23:12,057 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:12,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909159455] [2021-05-02 20:23:12,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909159455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:12,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:12,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:23:12,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15937377] [2021-05-02 20:23:12,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:23:12,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:12,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:23:12,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:23:12,059 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 20:23:12,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:12,139 INFO L93 Difference]: Finished difference Result 162 states and 219 transitions. [2021-05-02 20:23:12,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:23:12,140 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 20:23:12,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:12,141 INFO L225 Difference]: With dead ends: 162 [2021-05-02 20:23:12,141 INFO L226 Difference]: Without dead ends: 162 [2021-05-02 20:23:12,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:23:12,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-02 20:23:12,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 138. [2021-05-02 20:23:12,147 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 20:23:12,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 180 transitions. [2021-05-02 20:23:12,148 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 180 transitions. Word has length 111 [2021-05-02 20:23:12,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:12,148 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 180 transitions. [2021-05-02 20:23:12,148 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 20:23:12,148 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2021-05-02 20:23:12,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 20:23:12,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:12,149 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 20:23:12,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:23:12,364 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:12,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:12,364 INFO L82 PathProgramCache]: Analyzing trace with hash -966740615, now seen corresponding path program 2 times [2021-05-02 20:23:12,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:12,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759277490] [2021-05-02 20:23:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:12,370 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:12,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881507079] [2021-05-02 20:23:12,370 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 20:23:12,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:23:12,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:12,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 20:23:12,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:12,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:12,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:13,034 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 20:23:13,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:13,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759277490] [2021-05-02 20:23:13,034 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:13,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881507079] [2021-05-02 20:23:13,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881507079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:13,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:13,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:23:13,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155051173] [2021-05-02 20:23:13,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:23:13,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:13,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:23:13,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:23:13,036 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 20:23:13,569 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-05-02 20:23:13,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:13,754 INFO L93 Difference]: Finished difference Result 172 states and 228 transitions. [2021-05-02 20:23:13,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:23:13,754 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 20:23:13,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:13,755 INFO L225 Difference]: With dead ends: 172 [2021-05-02 20:23:13,755 INFO L226 Difference]: Without dead ends: 171 [2021-05-02 20:23:13,756 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 537.0ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-02 20:23:13,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-02 20:23:13,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2021-05-02 20:23:13,761 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 20:23:13,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 224 transitions. [2021-05-02 20:23:13,762 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 224 transitions. Word has length 113 [2021-05-02 20:23:13,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:13,762 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 224 transitions. [2021-05-02 20:23:13,762 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 20:23:13,763 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 224 transitions. [2021-05-02 20:23:13,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 20:23:13,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:13,764 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 20:23:13,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:23:13,986 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:13,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:13,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1855467922, now seen corresponding path program 3 times [2021-05-02 20:23:13,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:13,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331821412] [2021-05-02 20:23:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:13,999 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:13,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318157846] [2021-05-02 20:23:13,999 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 20:23:14,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:23:14,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:14,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:23:14,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:14,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,254 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 20:23:14,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:14,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331821412] [2021-05-02 20:23:14,255 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:14,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318157846] [2021-05-02 20:23:14,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318157846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:14,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:14,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:23:14,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871075745] [2021-05-02 20:23:14,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:23:14,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:14,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:23:14,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:23:14,256 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 20:23:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:14,458 INFO L93 Difference]: Finished difference Result 207 states and 292 transitions. [2021-05-02 20:23:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:23:14,459 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 20:23:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:14,460 INFO L225 Difference]: With dead ends: 207 [2021-05-02 20:23:14,460 INFO L226 Difference]: Without dead ends: 207 [2021-05-02 20:23:14,460 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:23:14,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-02 20:23:14,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 188. [2021-05-02 20:23:14,466 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 20:23:14,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 259 transitions. [2021-05-02 20:23:14,467 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 259 transitions. Word has length 116 [2021-05-02 20:23:14,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:14,467 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 259 transitions. [2021-05-02 20:23:14,467 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 20:23:14,467 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 259 transitions. [2021-05-02 20:23:14,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 20:23:14,468 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:14,469 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 20:23:14,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:23:14,677 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:14,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:14,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1380247977, now seen corresponding path program 2 times [2021-05-02 20:23:14,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:14,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125160167] [2021-05-02 20:23:14,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:14,688 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:14,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87827105] [2021-05-02 20:23:14,688 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 20:23:14,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:23:14,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:14,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:23:14,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:14,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:14,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:15,306 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 20:23:15,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:15,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125160167] [2021-05-02 20:23:15,306 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:15,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87827105] [2021-05-02 20:23:15,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87827105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:15,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:15,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 20:23:15,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77021673] [2021-05-02 20:23:15,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 20:23:15,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:15,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 20:23:15,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:23:15,308 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 20:23:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:17,678 INFO L93 Difference]: Finished difference Result 265 states and 378 transitions. [2021-05-02 20:23:17,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 20:23:17,679 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 20:23:17,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:17,680 INFO L225 Difference]: With dead ends: 265 [2021-05-02 20:23:17,680 INFO L226 Difference]: Without dead ends: 265 [2021-05-02 20:23:17,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1165.8ms TimeCoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 20:23:17,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-02 20:23:17,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 259. [2021-05-02 20:23:17,688 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 20:23:17,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 371 transitions. [2021-05-02 20:23:17,689 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 371 transitions. Word has length 122 [2021-05-02 20:23:17,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:17,690 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 371 transitions. [2021-05-02 20:23:17,690 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 20:23:17,690 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 371 transitions. [2021-05-02 20:23:17,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 20:23:17,691 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:17,691 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 20:23:17,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:17,905 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:17,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:17,905 INFO L82 PathProgramCache]: Analyzing trace with hash 259955901, now seen corresponding path program 3 times [2021-05-02 20:23:17,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:17,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977024772] [2021-05-02 20:23:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:17,916 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:17,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071049836] [2021-05-02 20:23:17,916 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 20:23:17,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:23:17,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:17,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 20:23:17,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:17,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:17,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:18,351 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 20:23:18,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:18,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977024772] [2021-05-02 20:23:18,351 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:18,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071049836] [2021-05-02 20:23:18,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071049836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:18,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:18,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:23:18,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838495897] [2021-05-02 20:23:18,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:23:18,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:18,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:23:18,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:23:18,353 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 20:23:18,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:18,957 INFO L93 Difference]: Finished difference Result 299 states and 421 transitions. [2021-05-02 20:23:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:23:18,961 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 20:23:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:18,962 INFO L225 Difference]: With dead ends: 299 [2021-05-02 20:23:18,963 INFO L226 Difference]: Without dead ends: 299 [2021-05-02 20:23:18,963 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 269.3ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-02 20:23:18,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-05-02 20:23:18,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 296. [2021-05-02 20:23:18,971 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 20:23:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 418 transitions. [2021-05-02 20:23:18,973 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 418 transitions. Word has length 127 [2021-05-02 20:23:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:18,973 INFO L480 AbstractCegarLoop]: Abstraction has 296 states and 418 transitions. [2021-05-02 20:23:18,973 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 20:23:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 418 transitions. [2021-05-02 20:23:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-02 20:23:18,975 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:18,975 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 20:23:19,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:19,196 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:19,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:19,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1431100670, now seen corresponding path program 4 times [2021-05-02 20:23:19,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:19,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694536862] [2021-05-02 20:23:19,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:19,202 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:19,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365833984] [2021-05-02 20:23:19,203 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 20:23:19,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:23:19,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:19,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 20:23:19,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:19,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 121 proven. 109 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-05-02 20:23:19,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:19,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694536862] [2021-05-02 20:23:19,966 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:19,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365833984] [2021-05-02 20:23:19,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365833984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:19,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:19,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:23:19,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489651535] [2021-05-02 20:23:19,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:23:19,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:19,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:23:19,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:23:19,968 INFO L87 Difference]: Start difference. First operand 296 states and 418 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-02 20:23:26,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:26,592 INFO L93 Difference]: Finished difference Result 306 states and 426 transitions. [2021-05-02 20:23:26,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:23:26,593 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2021-05-02 20:23:26,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:26,594 INFO L225 Difference]: With dead ends: 306 [2021-05-02 20:23:26,594 INFO L226 Difference]: Without dead ends: 306 [2021-05-02 20:23:26,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 478.9ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:23:26,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-02 20:23:26,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2021-05-02 20:23:26,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 157 states have (on average 1.1528662420382165) internal successors, (181), 159 states have internal predecessors, (181), 123 states have call successors, (123), 24 states have call predecessors, (123), 23 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 20:23:26,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 424 transitions. [2021-05-02 20:23:26,604 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 424 transitions. Word has length 129 [2021-05-02 20:23:26,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:26,605 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 424 transitions. [2021-05-02 20:23:26,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-02 20:23:26,605 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 424 transitions. [2021-05-02 20:23:26,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 20:23:26,606 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:26,606 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 20:23:26,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 20:23:26,829 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:26,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:26,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1491357193, now seen corresponding path program 5 times [2021-05-02 20:23:26,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:26,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344282117] [2021-05-02 20:23:26,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:26,843 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:26,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024048163] [2021-05-02 20:23:26,843 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 20:23:27,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 20:23:27,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:27,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-02 20:23:27,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:27,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:27,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:28,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:28,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:28,133 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 20:23:28,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:28,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344282117] [2021-05-02 20:23:28,134 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:28,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024048163] [2021-05-02 20:23:28,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024048163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:28,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:28,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 20:23:28,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71526069] [2021-05-02 20:23:28,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 20:23:28,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:28,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 20:23:28,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-02 20:23:28,135 INFO L87 Difference]: Start difference. First operand 304 states and 424 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 20:23:29,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:29,375 INFO L93 Difference]: Finished difference Result 325 states and 441 transitions. [2021-05-02 20:23:29,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 20:23:29,377 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 20:23:29,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:29,379 INFO L225 Difference]: With dead ends: 325 [2021-05-02 20:23:29,379 INFO L226 Difference]: Without dead ends: 325 [2021-05-02 20:23:29,379 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1093.3ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-05-02 20:23:29,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-02 20:23:29,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 320. [2021-05-02 20:23:29,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 169 states have (on average 1.1420118343195267) internal successors, (193), 171 states have internal predecessors, (193), 123 states have call successors, (123), 28 states have call predecessors, (123), 27 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 20:23:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 436 transitions. [2021-05-02 20:23:29,388 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 436 transitions. Word has length 132 [2021-05-02 20:23:29,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:29,389 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 436 transitions. [2021-05-02 20:23:29,389 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 20:23:29,389 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 436 transitions. [2021-05-02 20:23:29,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 20:23:29,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:29,390 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 20:23:29,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 20:23:29,605 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:29,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1694952883, now seen corresponding path program 4 times [2021-05-02 20:23:29,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:29,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550768886] [2021-05-02 20:23:29,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:29,611 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:29,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595593448] [2021-05-02 20:23:29,611 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 20:23:29,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:23:29,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:29,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 20:23:29,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:29,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:29,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:30,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:30,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:30,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:30,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:30,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:30,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:30,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:30,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:30,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:30,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2021-05-02 20:23:30,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:30,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550768886] [2021-05-02 20:23:30,166 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:30,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595593448] [2021-05-02 20:23:30,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595593448] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:30,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:30,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:23:30,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541097491] [2021-05-02 20:23:30,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:23:30,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:30,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:23:30,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:23:30,168 INFO L87 Difference]: Start difference. First operand 320 states and 436 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2021-05-02 20:23:30,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:30,761 INFO L93 Difference]: Finished difference Result 358 states and 492 transitions. [2021-05-02 20:23:30,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:23:30,762 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 135 [2021-05-02 20:23:30,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:30,764 INFO L225 Difference]: With dead ends: 358 [2021-05-02 20:23:30,764 INFO L226 Difference]: Without dead ends: 357 [2021-05-02 20:23:30,764 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 367.5ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-02 20:23:30,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-05-02 20:23:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 355. [2021-05-02 20:23:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 186 states have (on average 1.1451612903225807) internal successors, (213), 188 states have internal predecessors, (213), 139 states have call successors, (139), 30 states have call predecessors, (139), 29 states have return successors, (136), 136 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-02 20:23:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 488 transitions. [2021-05-02 20:23:30,773 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 488 transitions. Word has length 135 [2021-05-02 20:23:30,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:30,774 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 488 transitions. [2021-05-02 20:23:30,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2021-05-02 20:23:30,774 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 488 transitions. [2021-05-02 20:23:30,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 20:23:30,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:30,775 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 20:23:30,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:30,976 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:30,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:30,977 INFO L82 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 5 times [2021-05-02 20:23:30,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:30,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373648556] [2021-05-02 20:23:30,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:30,987 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:30,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1652901603] [2021-05-02 20:23:30,987 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 20:23:31,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 20:23:31,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:31,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 95 conjunts are in the unsatisfiable core [2021-05-02 20:23:31,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:31,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:31,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:37,726 WARN L205 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-05-02 20:23:37,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:37,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:37,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:37,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:37,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:37,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:37,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:37,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:37,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:37,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:37,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:37,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:37,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:37,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:37,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:37,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:37,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:37,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:38,258 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 20:23:38,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:38,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373648556] [2021-05-02 20:23:38,258 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:38,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652901603] [2021-05-02 20:23:38,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652901603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:38,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:38,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 20:23:38,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11991848] [2021-05-02 20:23:38,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 20:23:38,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:38,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 20:23:38,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=361, Unknown=2, NotChecked=0, Total=420 [2021-05-02 20:23:38,260 INFO L87 Difference]: Start difference. First operand 355 states and 488 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 20:23:41,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:41,365 INFO L93 Difference]: Finished difference Result 407 states and 556 transitions. [2021-05-02 20:23:41,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:23:41,366 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 20:23:41,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:41,367 INFO L225 Difference]: With dead ends: 407 [2021-05-02 20:23:41,368 INFO L226 Difference]: Without dead ends: 407 [2021-05-02 20:23:41,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 6983.4ms TimeCoverageRelationStatistics Valid=101, Invalid=709, Unknown=2, NotChecked=0, Total=812 [2021-05-02 20:23:41,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-05-02 20:23:41,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 403. [2021-05-02 20:23:41,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 212 states have (on average 1.1462264150943395) internal successors, (243), 215 states have internal predecessors, (243), 156 states have call successors, (156), 35 states have call predecessors, (156), 34 states have return successors, (153), 152 states have call predecessors, (153), 153 states have call successors, (153) [2021-05-02 20:23:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 552 transitions. [2021-05-02 20:23:41,379 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 552 transitions. Word has length 138 [2021-05-02 20:23:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:41,379 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 552 transitions. [2021-05-02 20:23:41,379 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 20:23:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 552 transitions. [2021-05-02 20:23:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 20:23:41,381 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:41,381 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 20:23:41,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 20:23:41,603 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:41,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:41,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1199073726, now seen corresponding path program 1 times [2021-05-02 20:23:41,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:41,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728715174] [2021-05-02 20:23:41,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:41,613 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:41,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158264496] [2021-05-02 20:23:41,613 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 20:23:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:23:41,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 20:23:41,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:41,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:41,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:42,407 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 20:23:42,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:23:42,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728715174] [2021-05-02 20:23:42,408 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:23:42,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158264496] [2021-05-02 20:23:42,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158264496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:23:42,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:23:42,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 20:23:42,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127860923] [2021-05-02 20:23:42,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 20:23:42,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:23:42,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 20:23:42,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:23:42,409 INFO L87 Difference]: Start difference. First operand 403 states and 552 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 20:23:43,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:23:43,463 INFO L93 Difference]: Finished difference Result 415 states and 562 transitions. [2021-05-02 20:23:43,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:23:43,464 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 20:23:43,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:23:43,466 INFO L225 Difference]: With dead ends: 415 [2021-05-02 20:23:43,466 INFO L226 Difference]: Without dead ends: 413 [2021-05-02 20:23:43,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 656.9ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-05-02 20:23:43,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-02 20:23:43,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 410. [2021-05-02 20:23:43,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 218 states have (on average 1.1376146788990826) internal successors, (248), 220 states have internal predecessors, (248), 155 states have call successors, (155), 37 states have call predecessors, (155), 36 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2021-05-02 20:23:43,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 555 transitions. [2021-05-02 20:23:43,478 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 555 transitions. Word has length 143 [2021-05-02 20:23:43,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:23:43,479 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 555 transitions. [2021-05-02 20:23:43,479 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 20:23:43,479 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 555 transitions. [2021-05-02 20:23:43,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-02 20:23:43,480 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:23:43,480 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 20:23:43,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:23:43,697 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:23:43,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:23:43,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1825079459, now seen corresponding path program 6 times [2021-05-02 20:23:43,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:23:43,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507365699] [2021-05-02 20:23:43,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:23:43,704 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:23:43,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [158681676] [2021-05-02 20:23:43,704 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 20:23:44,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 20:23:44,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:23:44,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 78 conjunts are in the unsatisfiable core [2021-05-02 20:23:44,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:23:44,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:44,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:23:55,092 WARN L205 SmtUtils]: Spent 10.15 s on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 20:24:20,058 WARN L205 SmtUtils]: Spent 24.90 s on a formula simplification that was a NOOP. DAG size: 30 [2021-05-02 20:24:22,083 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 10) (= c_main_~p~0 1)) is different from false [2021-05-02 20:24:22,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:22,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:24,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:26,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:28,402 WARN L838 $PredicateComparison]: unable to prove that (or (and (= |c___VERIFIER_assert_#in~cond| 0) (exists ((v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int) (v_main_~a~0_BEFORE_CALL_99 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 (<= v_main_~x~0_BEFORE_CALL_261 10) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_99)) (= (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~y~0_BEFORE_CALL_215 v_main_~a~0_BEFORE_CALL_99)) (+ .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215) v_main_~a~0_BEFORE_CALL_99)) (< v_main_~a~0_BEFORE_CALL_99 v_main_~y~0_BEFORE_CALL_215) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (not (= v_main_~a~0_BEFORE_CALL_99 (+ v_main_~x~0_BEFORE_CALL_261 .cse0))))))) (= |c___VERIFIER_assert_#in~cond| 1)) is different from false [2021-05-02 20:24:28,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:28,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:30,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:32,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:34,559 WARN L838 $PredicateComparison]: unable to prove that (or (= c___VERIFIER_assert_~cond 1) (and (= c___VERIFIER_assert_~cond 0) (exists ((v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int) (v_main_~a~0_BEFORE_CALL_99 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 (<= v_main_~x~0_BEFORE_CALL_261 10) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_99)) (= (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~y~0_BEFORE_CALL_215 v_main_~a~0_BEFORE_CALL_99)) (+ .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215) v_main_~a~0_BEFORE_CALL_99)) (< v_main_~a~0_BEFORE_CALL_99 v_main_~y~0_BEFORE_CALL_215) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (not (= v_main_~a~0_BEFORE_CALL_99 (+ v_main_~x~0_BEFORE_CALL_261 .cse0)))))))) is different from false [2021-05-02 20:24:34,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:34,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:36,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:38,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:40,674 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int) (v_main_~a~0_BEFORE_CALL_99 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 (<= v_main_~x~0_BEFORE_CALL_261 10) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_99)) (= (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~y~0_BEFORE_CALL_215 v_main_~a~0_BEFORE_CALL_99)) (+ .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215) v_main_~a~0_BEFORE_CALL_99)) (< v_main_~a~0_BEFORE_CALL_99 v_main_~y~0_BEFORE_CALL_215) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (not (= v_main_~a~0_BEFORE_CALL_99 (+ v_main_~x~0_BEFORE_CALL_261 .cse0)))))) is different from false [2021-05-02 20:24:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 110 proven. 69 refuted. 0 times theorem prover too weak. 496 trivial. 18 not checked. [2021-05-02 20:24:40,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:24:40,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507365699] [2021-05-02 20:24:40,677 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:24:40,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158681676] [2021-05-02 20:24:40,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158681676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:24:40,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:24:40,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 20:24:40,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229989374] [2021-05-02 20:24:40,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 20:24:40,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:24:40,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 20:24:40,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=200, Unknown=4, NotChecked=124, Total=380 [2021-05-02 20:24:40,679 INFO L87 Difference]: Start difference. First operand 410 states and 555 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 20:24:49,932 WARN L205 SmtUtils]: Spent 4.46 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-02 20:24:52,140 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~y~0))) (and (= (* c_main_~y~0 c_main_~y~0) c_main_~yy~0) (= c_main_~r~0 1) (< c_main_~xy~0 2147483647) (= c_main_~q~0 1) (= c_main_~y~0 (+ c_main_~b~0 c_main_~c~0)) (= .cse0 c_main_~xy~0) (< c_main_~c~0 c_main_~b~0) (< .cse0 2147483647) (<= 0 c_main_~x~0) (<= c_main_~x~0 10) (< c_main_~b~0 c_main_~y~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 20:24:54,219 WARN L838 $PredicateComparison]: unable to prove that (and (or (= c___VERIFIER_assert_~cond 1) (and (= c___VERIFIER_assert_~cond 0) (exists ((v_main_~x~0_BEFORE_CALL_261 Int) (v_main_~r~0_BEFORE_CALL_162 Int) (v_main_~y~0_BEFORE_CALL_215 Int) (v_main_~a~0_BEFORE_CALL_99 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 (<= v_main_~x~0_BEFORE_CALL_261 10) (< v_main_~y~0_BEFORE_CALL_215 (* 2 v_main_~a~0_BEFORE_CALL_99)) (= (+ v_main_~x~0_BEFORE_CALL_261 .cse0 (* v_main_~y~0_BEFORE_CALL_215 v_main_~a~0_BEFORE_CALL_99)) (+ .cse1 (* v_main_~r~0_BEFORE_CALL_162 v_main_~y~0_BEFORE_CALL_215 v_main_~y~0_BEFORE_CALL_215) v_main_~a~0_BEFORE_CALL_99)) (< v_main_~a~0_BEFORE_CALL_99 v_main_~y~0_BEFORE_CALL_215) (< .cse1 2147483647) (<= 0 v_main_~x~0_BEFORE_CALL_261) (not (= v_main_~a~0_BEFORE_CALL_99 (+ v_main_~x~0_BEFORE_CALL_261 .cse0)))))))) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond)) is different from false [2021-05-02 20:24:54,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:24:54,608 INFO L93 Difference]: Finished difference Result 499 states and 689 transitions. [2021-05-02 20:24:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 20:24:54,609 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 20:24:54,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:24:54,611 INFO L225 Difference]: With dead ends: 499 [2021-05-02 20:24:54,611 INFO L226 Difference]: Without dead ends: 498 [2021-05-02 20:24:54,611 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 52221.6ms TimeCoverageRelationStatistics Valid=76, Invalid=322, Unknown=6, NotChecked=246, Total=650 [2021-05-02 20:24:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-05-02 20:24:54,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 424. [2021-05-02 20:24:54,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 228 states have (on average 1.131578947368421) internal successors, (258), 231 states have internal predecessors, (258), 157 states have call successors, (157), 39 states have call predecessors, (157), 38 states have return successors, (154), 153 states have call predecessors, (154), 154 states have call successors, (154) [2021-05-02 20:24:54,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 569 transitions. [2021-05-02 20:24:54,624 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 569 transitions. Word has length 144 [2021-05-02 20:24:54,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:24:54,624 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 569 transitions. [2021-05-02 20:24:54,624 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 20:24:54,625 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 569 transitions. [2021-05-02 20:24:54,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-02 20:24:54,626 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:24:54,626 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 20:24:54,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 20:24:54,845 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:24:54,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:24:54,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1855514487, now seen corresponding path program 7 times [2021-05-02 20:24:54,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:24:54,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124826852] [2021-05-02 20:24:54,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:24:54,850 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:24:54,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9250104] [2021-05-02 20:24:54,850 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 20:24:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:24:54,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 99 conjunts are in the unsatisfiable core [2021-05-02 20:24:54,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:24:54,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:54,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:54,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:54,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:54,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:54,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:55,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:57,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:57,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:57,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:59,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:59,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:59,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:59,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:59,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:59,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:59,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:59,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:59,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:59,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:59,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:59,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:59,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:59,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:24:59,946 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 20:24:59,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:24:59,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124826852] [2021-05-02 20:24:59,946 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:24:59,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9250104] [2021-05-02 20:24:59,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9250104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:24:59,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:24:59,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 20:24:59,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498424138] [2021-05-02 20:24:59,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 20:24:59,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:24:59,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 20:24:59,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-02 20:24:59,947 INFO L87 Difference]: Start difference. First operand 424 states and 569 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 20:25:00,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:00,926 INFO L93 Difference]: Finished difference Result 460 states and 616 transitions. [2021-05-02 20:25:00,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:25:00,926 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 20:25:00,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:00,928 INFO L225 Difference]: With dead ends: 460 [2021-05-02 20:25:00,928 INFO L226 Difference]: Without dead ends: 460 [2021-05-02 20:25:00,929 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 699.7ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-05-02 20:25:00,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-02 20:25:00,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 457. [2021-05-02 20:25:00,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 246 states have (on average 1.1300813008130082) internal successors, (278), 249 states have internal predecessors, (278), 169 states have call successors, (169), 42 states have call predecessors, (169), 41 states have return successors, (166), 165 states have call predecessors, (166), 166 states have call successors, (166) [2021-05-02 20:25:00,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 613 transitions. [2021-05-02 20:25:00,940 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 613 transitions. Word has length 149 [2021-05-02 20:25:00,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:00,940 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 613 transitions. [2021-05-02 20:25:00,940 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 20:25:00,941 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 613 transitions. [2021-05-02 20:25:00,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-02 20:25:00,942 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:00,942 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 20:25:01,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:25:01,164 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:01,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1402624196, now seen corresponding path program 8 times [2021-05-02 20:25:01,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:01,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359695462] [2021-05-02 20:25:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:01,173 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:01,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598915424] [2021-05-02 20:25:01,173 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 20:25:01,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:25:01,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:25:01,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 77 conjunts are in the unsatisfiable core [2021-05-02 20:25:01,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:01,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:01,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:02,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:02,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:02,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:02,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:02,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:02,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:02,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:02,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 137 proven. 127 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-05-02 20:25:02,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:02,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359695462] [2021-05-02 20:25:02,368 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:02,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598915424] [2021-05-02 20:25:02,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598915424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:25:02,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:25:02,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 20:25:02,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179995991] [2021-05-02 20:25:02,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 20:25:02,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:02,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 20:25:02,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:25:02,369 INFO L87 Difference]: Start difference. First operand 457 states and 613 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2021-05-02 20:25:05,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:05,427 INFO L93 Difference]: Finished difference Result 463 states and 618 transitions. [2021-05-02 20:25:05,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 20:25:05,428 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) Word has length 151 [2021-05-02 20:25:05,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:05,430 INFO L225 Difference]: With dead ends: 463 [2021-05-02 20:25:05,430 INFO L226 Difference]: Without dead ends: 463 [2021-05-02 20:25:05,430 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 854.5ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-05-02 20:25:05,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-05-02 20:25:05,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 432. [2021-05-02 20:25:05,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 234 states have (on average 1.1282051282051282) internal successors, (264), 237 states have internal predecessors, (264), 157 states have call successors, (157), 41 states have call predecessors, (157), 40 states have return successors, (154), 153 states have call predecessors, (154), 154 states have call successors, (154) [2021-05-02 20:25:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 575 transitions. [2021-05-02 20:25:05,442 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 575 transitions. Word has length 151 [2021-05-02 20:25:05,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:05,442 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 575 transitions. [2021-05-02 20:25:05,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 16 states have internal predecessors, (34), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 9 states have call predecessors, (26), 10 states have call successors, (26) [2021-05-02 20:25:05,442 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 575 transitions. [2021-05-02 20:25:05,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 20:25:05,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:05,444 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 20:25:05,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 20:25:05,657 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:05,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1866948721, now seen corresponding path program 9 times [2021-05-02 20:25:05,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:05,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751285541] [2021-05-02 20:25:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:05,667 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:05,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125225739] [2021-05-02 20:25:05,668 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 20:25:05,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:25:05,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:25:05,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 20:25:05,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:06,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:06,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:06,188 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 20:25:06,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:06,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751285541] [2021-05-02 20:25:06,188 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:06,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125225739] [2021-05-02 20:25:06,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125225739] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:25:06,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:25:06,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:25:06,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114290607] [2021-05-02 20:25:06,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:25:06,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:25:06,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:25:06,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:25:06,189 INFO L87 Difference]: Start difference. First operand 432 states and 575 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 20:25:13,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:25:13,711 INFO L93 Difference]: Finished difference Result 473 states and 628 transitions. [2021-05-02 20:25:13,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:25:13,712 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 20:25:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:25:13,714 INFO L225 Difference]: With dead ends: 473 [2021-05-02 20:25:13,714 INFO L226 Difference]: Without dead ends: 473 [2021-05-02 20:25:13,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 252.3ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:25:13,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-05-02 20:25:13,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 469. [2021-05-02 20:25:13,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 255 states have (on average 1.1294117647058823) internal successors, (288), 258 states have internal predecessors, (288), 169 states have call successors, (169), 45 states have call predecessors, (169), 44 states have return successors, (166), 165 states have call predecessors, (166), 166 states have call successors, (166) [2021-05-02 20:25:13,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 623 transitions. [2021-05-02 20:25:13,725 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 623 transitions. Word has length 154 [2021-05-02 20:25:13,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:25:13,726 INFO L480 AbstractCegarLoop]: Abstraction has 469 states and 623 transitions. [2021-05-02 20:25:13,726 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 20:25:13,726 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 623 transitions. [2021-05-02 20:25:13,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 20:25:13,727 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:25:13,727 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 20:25:13,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:25:13,941 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:25:13,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:25:13,941 INFO L82 PathProgramCache]: Analyzing trace with hash 742722429, now seen corresponding path program 10 times [2021-05-02 20:25:13,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:25:13,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451090160] [2021-05-02 20:25:13,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:25:13,951 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:25:13,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325334573] [2021-05-02 20:25:13,951 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 20:25:14,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:25:14,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:25:14,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 105 conjunts are in the unsatisfiable core [2021-05-02 20:25:14,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:25:14,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:14,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:16,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:16,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:16,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:16,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:16,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:16,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:16,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:16,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:16,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:17,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:32,023 WARN L205 SmtUtils]: Spent 10.23 s on a formula simplification that was a NOOP. DAG size: 44 [2021-05-02 20:25:32,592 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-02 20:25:32,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:32,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:32,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:32,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:32,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:32,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:32,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:32,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:32,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:32,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:32,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:32,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:32,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:32,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:32,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:32,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:25:32,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:25:32,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451090160] [2021-05-02 20:25:32,866 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:25:32,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325334573] [2021-05-02 20:25:32,866 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-02 20:25:33,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 20:25:33,081 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Infinite/NaN value at de.uni_freiburg.informatik.ultimate.logic.Theory.constant(Theory.java:446) at de.uni_freiburg.informatik.ultimate.logic.Rational.toTerm(Rational.java:921) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.div(SmtUtils.java:1578) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1391) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1321) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.convertApplicationTerm(SmtUtils.java:1310) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SubstitutionWithLocalSimplification.convertApplicationTerm(SubstitutionWithLocalSimplification.java:49) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:339) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.doSubstitutions(DualJunctionDer.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperSbr.applyReplacement(DualJunctionDer.java:386) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:333) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:231) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:149) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:127) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:465) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:612) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-02 20:25:33,086 INFO L168 Benchmark]: Toolchain (without parser) took 162148.95 ms. Allocated memory was 186.6 MB in the beginning and 289.4 MB in the end (delta: 102.8 MB). Free memory was 151.2 MB in the beginning and 177.4 MB in the end (delta: -26.3 MB). Peak memory consumption was 77.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:25:33,086 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 186.6 MB. Free memory is still 167.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:25:33,087 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.22 ms. Allocated memory is still 186.6 MB. Free memory was 150.9 MB in the beginning and 168.9 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.2 MB. Max. memory is 8.0 GB. [2021-05-02 20:25:33,087 INFO L168 Benchmark]: Boogie Preprocessor took 21.45 ms. Allocated memory is still 186.6 MB. Free memory was 168.9 MB in the beginning and 167.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:25:33,087 INFO L168 Benchmark]: RCFGBuilder took 270.77 ms. Allocated memory is still 186.6 MB. Free memory was 167.2 MB in the beginning and 150.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:25:33,087 INFO L168 Benchmark]: IcfgTransformer took 18.56 ms. Allocated memory is still 186.6 MB. Free memory was 150.4 MB in the beginning and 149.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:25:33,087 INFO L168 Benchmark]: TraceAbstraction took 161541.05 ms. Allocated memory was 186.6 MB in the beginning and 289.4 MB in the end (delta: 102.8 MB). Free memory was 148.6 MB in the beginning and 177.4 MB in the end (delta: -28.8 MB). Peak memory consumption was 75.3 MB. Max. memory is 8.0 GB. [2021-05-02 20:25:33,087 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 186.6 MB. Free memory is still 167.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 289.22 ms. Allocated memory is still 186.6 MB. Free memory was 150.9 MB in the beginning and 168.9 MB in the end (delta: -18.0 MB). Peak memory consumption was 11.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.45 ms. Allocated memory is still 186.6 MB. Free memory was 168.9 MB in the beginning and 167.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 270.77 ms. Allocated memory is still 186.6 MB. Free memory was 167.2 MB in the beginning and 150.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 18.56 ms. Allocated memory is still 186.6 MB. Free memory was 150.4 MB in the beginning and 149.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 161541.05 ms. Allocated memory was 186.6 MB in the beginning and 289.4 MB in the end (delta: 102.8 MB). Free memory was 148.6 MB in the beginning and 177.4 MB in the end (delta: -28.8 MB). Peak memory consumption was 75.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Infinite/NaN value de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Infinite/NaN value: de.uni_freiburg.informatik.ultimate.logic.Theory.constant(Theory.java:446) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...