/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/fermat2-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:41:11,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:41:11,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:41:11,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:41:11,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:41:11,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:41:11,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:41:11,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:41:11,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:41:11,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:41:11,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:41:11,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:41:11,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:41:11,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:41:11,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:41:11,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:41:11,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:41:11,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:41:11,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:41:11,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:41:11,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:41:11,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:41:11,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:41:11,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:41:11,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:41:11,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:41:11,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:41:11,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:41:11,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:41:11,498 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:41:11,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:41:11,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:41:11,501 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:41:11,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:41:11,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:41:11,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:41:11,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:41:11,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:41:11,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:41:11,502 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:41:11,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:41:11,503 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:41:11,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:41:11,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:41:11,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:41:11,503 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:41:11,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:41:11,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:41:11,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:41:11,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:41:11,504 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:41:11,505 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:41:11,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:41:11,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:41:11,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:41:11,768 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:41:11,769 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:41:11,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound20.c [2021-05-02 20:41:11,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12447ba56/24f72921d53042b0831291305311ca8e/FLAG1211a6e64 [2021-05-02 20:41:12,227 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:41:12,227 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound20.c [2021-05-02 20:41:12,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12447ba56/24f72921d53042b0831291305311ca8e/FLAG1211a6e64 [2021-05-02 20:41:12,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12447ba56/24f72921d53042b0831291305311ca8e [2021-05-02 20:41:12,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:41:12,619 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:41:12,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:41:12,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:41:12,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:41:12,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:41:12" (1/1) ... [2021-05-02 20:41:12,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50c546a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:12, skipping insertion in model container [2021-05-02 20:41:12,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:41:12" (1/1) ... [2021-05-02 20:41:12,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:41:12,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:41:12,727 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/fermat2-ll_unwindbound20.c[524,537] [2021-05-02 20:41:12,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:41:12,745 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:41:12,752 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/fermat2-ll_unwindbound20.c[524,537] [2021-05-02 20:41:12,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:41:12,787 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:41:12,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:12 WrapperNode [2021-05-02 20:41:12,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:41:12,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:41:12,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:41:12,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:41:12,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:12" (1/1) ... [2021-05-02 20:41:12,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:12" (1/1) ... [2021-05-02 20:41:12,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:12" (1/1) ... [2021-05-02 20:41:12,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:12" (1/1) ... [2021-05-02 20:41:12,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:12" (1/1) ... [2021-05-02 20:41:12,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:12" (1/1) ... [2021-05-02 20:41:12,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:12" (1/1) ... [2021-05-02 20:41:12,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:41:12,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:41:12,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:41:12,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:41:12,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:12" (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 20:41:12,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:41:12,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:41:12,944 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:41:12,944 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:41:12,945 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:41:12,945 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:41:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:41:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:41:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:41:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:41:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:41:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:41:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:41:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:41:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:41:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:41:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:41:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:41:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:41:12,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:41:13,264 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:41:13,264 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:41:13,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:41:13 BoogieIcfgContainer [2021-05-02 20:41:13,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:41:13,266 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:41:13,266 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:41:13,266 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:41:13,268 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:41:13" (1/1) ... [2021-05-02 20:41:13,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:41:13 BasicIcfg [2021-05-02 20:41:13,300 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:41:13,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:41:13,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:41:13,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:41:13,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:41:12" (1/4) ... [2021-05-02 20:41:13,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5917100a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:41:13, skipping insertion in model container [2021-05-02 20:41:13,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:41:12" (2/4) ... [2021-05-02 20:41:13,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5917100a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:41:13, skipping insertion in model container [2021-05-02 20:41:13,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:41:13" (3/4) ... [2021-05-02 20:41:13,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5917100a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:41:13, skipping insertion in model container [2021-05-02 20:41:13,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:41:13" (4/4) ... [2021-05-02 20:41:13,305 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound20.cJordan [2021-05-02 20:41:13,308 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:41:13,314 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:41:13,324 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:41:13,339 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:41:13,339 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:41:13,339 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:41:13,339 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:41:13,339 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:41:13,339 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:41:13,339 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:41:13,340 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:41:13,348 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:41:13,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 20:41:13,352 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:41:13,352 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:41:13,353 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:41:13,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:41:13,356 INFO L82 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times [2021-05-02 20:41:13,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:41:13,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175543067] [2021-05-02 20:41:13,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:41:13,418 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:41:13,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437786753] [2021-05-02 20:41:13,419 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 20:41:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:41:13,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 20:41:13,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:41:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 20:41:13,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:41:13,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175543067] [2021-05-02 20:41:13,549 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:41:13,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437786753] [2021-05-02 20:41:13,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437786753] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:41:13,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:41:13,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 20:41:13,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181301911] [2021-05-02 20:41:13,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 20:41:13,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:41:13,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 20:41:13,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:41:13,562 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:41:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:41:13,571 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-05-02 20:41:13,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 20:41:13,572 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 20:41:13,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:41:13,576 INFO L225 Difference]: With dead ends: 30 [2021-05-02 20:41:13,576 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 20:41:13,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:41:13,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 20:41:13,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 20:41:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:41:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 20:41:13,597 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-02 20:41:13,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:41:13,598 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 20:41:13,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:41:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 20:41:13,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:41:13,599 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:41:13,599 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:41:13,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 20:41:13,818 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:41:13,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:41:13,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times [2021-05-02 20:41:13,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:41:13,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368565195] [2021-05-02 20:41:13,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:41:13,829 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:41:13,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953008873] [2021-05-02 20:41:13,830 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 20:41:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:41:13,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:41:13,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:41:13,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:13,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:13,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:13,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:13,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:41:13,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:41:13,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368565195] [2021-05-02 20:41:13,945 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:41:13,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953008873] [2021-05-02 20:41:13,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953008873] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:41:13,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:41:13,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:41:13,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781911993] [2021-05-02 20:41:13,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:41:13,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:41:13,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:41:13,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:41:13,947 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:41:13,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:41:13,955 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-02 20:41:13,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:41:13,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:41:13,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:41:13,956 INFO L225 Difference]: With dead ends: 27 [2021-05-02 20:41:13,956 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:41:13,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:41:13,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:41:13,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 20:41:13,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:41:13,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 20:41:13,960 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-02 20:41:13,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:41:13,961 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 20:41:13,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:41:13,961 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 20:41:13,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:41:13,962 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:41:13,962 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:41:14,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:41:14,180 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:41:14,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:41:14,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times [2021-05-02 20:41:14,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:41:14,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368076084] [2021-05-02 20:41:14,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:41:14,196 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:41:14,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174108029] [2021-05-02 20:41:14,196 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 20:41:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:41:14,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:41:14,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:41:14,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:14,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:14,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:14,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:41:14,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:41:14,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368076084] [2021-05-02 20:41:14,449 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:41:14,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174108029] [2021-05-02 20:41:14,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174108029] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:41:14,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:41:14,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:41:14,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508011522] [2021-05-02 20:41:14,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:41:14,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:41:14,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:41:14,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:41:14,451 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:41:18,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:41:18,595 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-05-02 20:41:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:41:18,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:41:18,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:41:18,597 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:41:18,597 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:41:18,597 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:41:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:41:18,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-02 20:41:18,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:41:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 20:41:18,604 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 20:41:18,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:41:18,604 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 20:41:18,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:41:18,604 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 20:41:18,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:41:18,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:41:18,605 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:41:18,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:41:18,806 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:41:18,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:41:18,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times [2021-05-02 20:41:18,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:41:18,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615724650] [2021-05-02 20:41:18,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:41:18,816 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:41:18,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422909257] [2021-05-02 20:41:18,816 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 20:41:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:41:18,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:41:18,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:41:18,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:18,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:19,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:19,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:19,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:19,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:19,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:19,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:19,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:19,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:19,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:41:19,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:41:19,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615724650] [2021-05-02 20:41:19,086 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:41:19,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422909257] [2021-05-02 20:41:19,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422909257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:41:19,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:41:19,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:41:19,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524170263] [2021-05-02 20:41:19,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:41:19,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:41:19,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:41:19,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:41:19,087 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:41:30,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:41:30,474 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-05-02 20:41:30,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:41:30,476 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 20:41:30,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:41:30,477 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:41:30,477 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 20:41:30,477 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:41:30,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 20:41:30,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-02 20:41:30,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:41:30,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 20:41:30,482 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 29 [2021-05-02 20:41:30,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:41:30,482 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 20:41:30,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:41:30,482 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 20:41:30,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:41:30,483 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:41:30,483 INFO L523 BasicCegarLoop]: trace histogram [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 20:41:30,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:41:30,693 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:41:30,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:41:30,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times [2021-05-02 20:41:30,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:41:30,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863182712] [2021-05-02 20:41:30,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:41:30,702 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:41:30,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919910316] [2021-05-02 20:41:30,702 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 20:41:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:41:30,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:41:30,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:41:30,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:30,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:30,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:30,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:30,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:30,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:30,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:30,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:41:30,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:41:30,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863182712] [2021-05-02 20:41:30,883 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:41:30,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919910316] [2021-05-02 20:41:30,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919910316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:41:30,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:41:30,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:41:30,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268251220] [2021-05-02 20:41:30,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:41:30,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:41:30,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:41:30,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:41:30,885 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:41:30,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:41:30,909 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-05-02 20:41:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:41:30,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 20:41:30,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:41:30,910 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:41:30,910 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 20:41:30,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:41:30,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 20:41:30,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 20:41:30,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:41:30,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-05-02 20:41:30,913 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 32 [2021-05-02 20:41:30,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:41:30,913 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-05-02 20:41:30,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:41:30,914 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-05-02 20:41:30,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:41:30,914 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:41:30,914 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:41:31,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:41:31,132 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:41:31,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:41:31,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1670019071, now seen corresponding path program 1 times [2021-05-02 20:41:31,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:41:31,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490105224] [2021-05-02 20:41:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:41:31,141 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:41:31,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348276137] [2021-05-02 20:41:31,141 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 20:41:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:41:31,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:41:31,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:41:31,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:31,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:41:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:41:34,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:41:34,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490105224] [2021-05-02 20:41:34,357 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:41:34,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348276137] [2021-05-02 20:41:34,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348276137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:41:34,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:41:34,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:41:34,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085754044] [2021-05-02 20:41:34,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:41:34,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:41:34,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:41:34,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=105, Unknown=1, NotChecked=0, Total=132 [2021-05-02 20:41:34,358 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:42:18,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:42:18,920 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2021-05-02 20:42:18,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:42:18,921 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 20:42:18,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:42:18,922 INFO L225 Difference]: With dead ends: 63 [2021-05-02 20:42:18,922 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 20:42:18,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 3072.1ms TimeCoverageRelationStatistics Valid=41, Invalid=168, Unknown=1, NotChecked=0, Total=210 [2021-05-02 20:42:18,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 20:42:18,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-05-02 20:42:18,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 42 states have internal predecessors, (50), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:42:18,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-05-02 20:42:18,927 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 32 [2021-05-02 20:42:18,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:42:18,927 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-05-02 20:42:18,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:42:18,928 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-05-02 20:42:18,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:42:18,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:42:18,928 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:42:19,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:42:19,129 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:42:19,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:42:19,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1737444544, now seen corresponding path program 1 times [2021-05-02 20:42:19,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:42:19,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623301225] [2021-05-02 20:42:19,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:42:19,138 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:42:19,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398303658] [2021-05-02 20:42:19,139 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 20:42:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:42:19,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:42:19,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:42:19,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:19,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:19,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:19,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:36,329 WARN L205 SmtUtils]: Spent 14.97 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:42:54,158 WARN L205 SmtUtils]: Spent 9.79 s on a formula simplification that was a NOOP. DAG size: 33 [2021-05-02 20:42:54,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 3 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:42:54,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:42:54,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623301225] [2021-05-02 20:42:54,219 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:42:54,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398303658] [2021-05-02 20:42:54,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398303658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:42:54,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:42:54,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:42:54,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652725824] [2021-05-02 20:42:54,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:42:54,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:42:54,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:42:54,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=104, Unknown=5, NotChecked=0, Total=132 [2021-05-02 20:42:54,220 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:43:52,753 WARN L205 SmtUtils]: Spent 13.37 s on a formula simplification that was a NOOP. DAG size: 38 [2021-05-02 20:44:55,757 WARN L205 SmtUtils]: Spent 37.50 s on a formula simplification that was a NOOP. DAG size: 39 [2021-05-02 20:45:40,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:40,884 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2021-05-02 20:45:40,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:45:40,884 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 20:45:40,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:40,885 INFO L225 Difference]: With dead ends: 64 [2021-05-02 20:45:40,885 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 20:45:40,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 106614.3ms TimeCoverageRelationStatistics Valid=52, Invalid=239, Unknown=15, NotChecked=0, Total=306 [2021-05-02 20:45:40,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 20:45:40,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-05-02 20:45:40,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 46 states have internal predecessors, (53), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:45:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2021-05-02 20:45:40,891 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 32 [2021-05-02 20:45:40,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:40,891 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2021-05-02 20:45:40,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:45:40,892 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2021-05-02 20:45:40,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:45:40,892 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:40,892 INFO L523 BasicCegarLoop]: trace histogram [3, 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] [2021-05-02 20:45:41,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:41,093 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:41,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:41,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1134321246, now seen corresponding path program 1 times [2021-05-02 20:45:41,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:41,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260643237] [2021-05-02 20:45:41,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:41,100 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:41,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408698714] [2021-05-02 20:45:41,100 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 20:45:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:45:41,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:45:41,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:41,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 20:45:41,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:41,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260643237] [2021-05-02 20:45:41,479 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:41,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408698714] [2021-05-02 20:45:41,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408698714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:45:41,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:45:41,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:45:41,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174255799] [2021-05-02 20:45:41,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:45:41,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:41,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:45:41,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:45:41,482 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:45:57,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:57,723 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2021-05-02 20:45:57,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:45:57,724 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2021-05-02 20:45:57,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:57,724 INFO L225 Difference]: With dead ends: 66 [2021-05-02 20:45:57,724 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 20:45:57,725 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:45:57,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 20:45:57,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-02 20:45:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:45:57,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-05-02 20:45:57,728 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 38 [2021-05-02 20:45:57,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:57,728 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-05-02 20:45:57,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:45:57,728 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-05-02 20:45:57,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:45:57,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:57,729 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-05-02 20:45:57,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 20:45:57,949 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:57,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1377493560, now seen corresponding path program 2 times [2021-05-02 20:45:57,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:57,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485365337] [2021-05-02 20:45:57,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:57,974 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:57,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658356509] [2021-05-02 20:45:57,974 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 20:45:58,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:45:58,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:45:58,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:45:58,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:58,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:45:58,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:45:58,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485365337] [2021-05-02 20:45:58,137 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:45:58,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658356509] [2021-05-02 20:45:58,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658356509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:45:58,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:45:58,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:45:58,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128631100] [2021-05-02 20:45:58,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:45:58,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:45:58,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:45:58,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:45:58,138 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:45:58,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:45:58,177 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2021-05-02 20:45:58,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:45:58,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 20:45:58,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:45:58,178 INFO L225 Difference]: With dead ends: 70 [2021-05-02 20:45:58,178 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 20:45:58,179 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:45:58,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 20:45:58,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-02 20:45:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 20:45:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2021-05-02 20:45:58,182 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 41 [2021-05-02 20:45:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:45:58,182 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2021-05-02 20:45:58,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:45:58,183 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2021-05-02 20:45:58,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:45:58,184 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:45:58,184 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:45:58,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:45:58,400 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:45:58,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:45:58,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1378566036, now seen corresponding path program 2 times [2021-05-02 20:45:58,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:45:58,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105743799] [2021-05-02 20:45:58,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:45:58,407 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:45:58,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448684325] [2021-05-02 20:45:58,407 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 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 20:45:58,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:45:58,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:45:58,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:45:58,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:45:58,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 20:46:01,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:46:01,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105743799] [2021-05-02 20:46:01,758 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:46:01,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448684325] [2021-05-02 20:46:01,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448684325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:46:01,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:46:01,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:46:01,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421851498] [2021-05-02 20:46:01,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:46:01,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:46:01,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:46:01,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=126, Unknown=1, NotChecked=0, Total=156 [2021-05-02 20:46:01,759 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:46:32,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:46:32,472 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2021-05-02 20:46:32,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:46:32,473 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 20:46:32,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:46:32,473 INFO L225 Difference]: With dead ends: 86 [2021-05-02 20:46:32,474 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 20:46:32,474 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 3114.3ms TimeCoverageRelationStatistics Valid=44, Invalid=195, Unknown=1, NotChecked=0, Total=240 [2021-05-02 20:46:32,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 20:46:32,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2021-05-02 20:46:32,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 62 states have internal predecessors, (71), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:46:32,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2021-05-02 20:46:32,479 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 41 [2021-05-02 20:46:32,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:46:32,479 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2021-05-02 20:46:32,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:46:32,480 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2021-05-02 20:46:32,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:46:32,480 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:46:32,480 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 20:46:32,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:46:32,681 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:46:32,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:46:32,682 INFO L82 PathProgramCache]: Analyzing trace with hash -2028897579, now seen corresponding path program 1 times [2021-05-02 20:46:32,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:46:32,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026574736] [2021-05-02 20:46:32,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:46:32,688 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:46:32,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371255355] [2021-05-02 20:46:32,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:46:32,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:46:32,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:46:32,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:46:32,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:32,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:32,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:32,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:32,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:32,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:32,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:32,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:46:32,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:46:32,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026574736] [2021-05-02 20:46:32,812 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:46:32,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371255355] [2021-05-02 20:46:32,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371255355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:46:32,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:46:32,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:46:32,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590916768] [2021-05-02 20:46:32,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:46:32,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:46:32,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:46:32,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:46:32,814 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:46:32,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:46:32,833 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2021-05-02 20:46:32,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:46:32,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2021-05-02 20:46:32,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:46:32,835 INFO L225 Difference]: With dead ends: 81 [2021-05-02 20:46:32,835 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 20:46:32,835 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:46:32,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 20:46:32,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-05-02 20:46:32,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 60 states have internal predecessors, (67), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:46:32,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2021-05-02 20:46:32,846 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 41 [2021-05-02 20:46:32,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:46:32,846 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2021-05-02 20:46:32,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:46:32,846 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2021-05-02 20:46:32,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 20:46:32,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:46:32,850 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:46:33,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 20:46:33,065 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:46:33,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:46:33,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1755535540, now seen corresponding path program 2 times [2021-05-02 20:46:33,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:46:33,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604478541] [2021-05-02 20:46:33,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:46:33,072 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:46:33,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295253675] [2021-05-02 20:46:33,072 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 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 20:46:33,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:46:33,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:46:33,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:46:33,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:46:33,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:33,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:33,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:33,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:33,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:33,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,002 WARN L205 SmtUtils]: Spent 9.34 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:46:45,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:45,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,477 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 60 [2021-05-02 20:46:49,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:49,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,118 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 68 [2021-05-02 20:47:04,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:04,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,216 WARN L205 SmtUtils]: Spent 4.30 s on a formula simplification that was a NOOP. DAG size: 74 [2021-05-02 20:47:19,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:19,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:47:21,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:47:21,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604478541] [2021-05-02 20:47:21,459 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:47:21,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295253675] [2021-05-02 20:47:21,459 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-02 20:47:21,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:47:21,674 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.AbstractGeneralizedAffineTerm.toTerm(AbstractGeneralizedAffineTerm.java:279) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialRelation.solveForSubject(PolynomialRelation.java:436) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfTir.tryToEliminateConjuncts(XnfTir.java:207) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfTir.tryToEliminateSingleDisjuct(XnfTir.java:143) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfTir.tryToEliminate(XnfTir.java:114) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.applyEliminationInner(PartialQuantifierElimination.java:531) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.applyEliminationOuter(PartialQuantifierElimination.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.applyTir(PartialQuantifierElimination.java:435) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:279) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:100) 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 20:47:21,677 INFO L168 Benchmark]: Toolchain (without parser) took 369058.72 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 143.8 MB in the beginning and 117.0 MB in the end (delta: 26.8 MB). Peak memory consumption was 64.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:47:21,677 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 180.4 MB. Free memory is still 161.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:47:21,677 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.69 ms. Allocated memory is still 180.4 MB. Free memory was 143.6 MB in the beginning and 163.2 MB in the end (delta: -19.6 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. [2021-05-02 20:47:21,678 INFO L168 Benchmark]: Boogie Preprocessor took 35.10 ms. Allocated memory is still 180.4 MB. Free memory was 163.2 MB in the beginning and 162.5 MB in the end (delta: 733.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:47:21,678 INFO L168 Benchmark]: RCFGBuilder took 441.54 ms. Allocated memory is still 180.4 MB. Free memory was 162.5 MB in the beginning and 147.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:47:21,678 INFO L168 Benchmark]: IcfgTransformer took 34.43 ms. Allocated memory is still 180.4 MB. Free memory was 147.2 MB in the beginning and 146.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:47:21,678 INFO L168 Benchmark]: TraceAbstraction took 368375.95 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 145.7 MB in the beginning and 117.0 MB in the end (delta: 28.7 MB). Peak memory consumption was 65.9 MB. Max. memory is 8.0 GB. [2021-05-02 20:47:21,678 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 180.4 MB. Free memory is still 161.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 164.69 ms. Allocated memory is still 180.4 MB. Free memory was 143.6 MB in the beginning and 163.2 MB in the end (delta: -19.6 MB). Peak memory consumption was 14.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.10 ms. Allocated memory is still 180.4 MB. Free memory was 163.2 MB in the beginning and 162.5 MB in the end (delta: 733.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 441.54 ms. Allocated memory is still 180.4 MB. Free memory was 162.5 MB in the beginning and 147.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 34.43 ms. Allocated memory is still 180.4 MB. Free memory was 147.2 MB in the beginning and 146.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 368375.95 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 145.7 MB in the beginning and 117.0 MB in the end (delta: 28.7 MB). Peak memory consumption was 65.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.AbstractGeneralizedAffineTerm.toTerm(AbstractGeneralizedAffineTerm.java:279) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...