/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/fermat1-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:34:48,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:34:48,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:34:48,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:34:48,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:34:48,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:34:48,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:34:48,633 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:34:48,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:34:48,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:34:48,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:34:48,637 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:34:48,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:34:48,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:34:48,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:34:48,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:34:48,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:34:48,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:34:48,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:34:48,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:34:48,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:34:48,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:34:48,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:34:48,646 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:34:48,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:34:48,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:34:48,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:34:48,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:34:48,661 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:34:48,669 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:34:48,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:34:48,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:34:48,670 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:34:48,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:34:48,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:34:48,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:34:48,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:34:48,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:34:48,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:34:48,671 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:34:48,671 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:34:48,671 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:34:48,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:34:48,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:34:48,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:34:48,672 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:34:48,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:34:48,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:34:48,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:34:48,673 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:34:48,673 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:34:48,673 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:34:48,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:34:48,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:34:48,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:34:48,932 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:34:48,932 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:34:48,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound10.c [2021-05-02 20:34:49,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/867b012b9/74991adfb4e14f4e9e1e15e4ab5c4fe9/FLAG7fb1906c9 [2021-05-02 20:34:49,411 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:34:49,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound10.c [2021-05-02 20:34:49,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/867b012b9/74991adfb4e14f4e9e1e15e4ab5c4fe9/FLAG7fb1906c9 [2021-05-02 20:34:49,822 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/867b012b9/74991adfb4e14f4e9e1e15e4ab5c4fe9 [2021-05-02 20:34:49,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:34:49,830 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:34:49,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:34:49,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:34:49,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:34:49,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:34:49" (1/1) ... [2021-05-02 20:34:49,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b1d065a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:49, skipping insertion in model container [2021-05-02 20:34:49,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:34:49" (1/1) ... [2021-05-02 20:34:49,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:34:49,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:34:49,952 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/fermat1-ll_valuebound10.c[535,548] [2021-05-02 20:34:49,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:34:49,972 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:34:50,026 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/fermat1-ll_valuebound10.c[535,548] [2021-05-02 20:34:50,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:34:50,070 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:34:50,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:50 WrapperNode [2021-05-02 20:34:50,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:34:50,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:34:50,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:34:50,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:34:50,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:50" (1/1) ... [2021-05-02 20:34:50,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:50" (1/1) ... [2021-05-02 20:34:50,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:50" (1/1) ... [2021-05-02 20:34:50,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:50" (1/1) ... [2021-05-02 20:34:50,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:50" (1/1) ... [2021-05-02 20:34:50,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:50" (1/1) ... [2021-05-02 20:34:50,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:50" (1/1) ... [2021-05-02 20:34:50,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:34:50,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:34:50,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:34:50,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:34:50,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:50" (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 20:34:50,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:34:50,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:34:50,208 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:34:50,208 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:34:50,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:34:50,208 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:34:50,208 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:34:50,208 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:34:50,208 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:34:50,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:34:50,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:34:50,209 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:34:50,209 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:34:50,209 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:34:50,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:34:50,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:34:50,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:34:50,209 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:34:50,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:34:50,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:34:50,462 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:34:50,462 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 20:34:50,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:34:50 BoogieIcfgContainer [2021-05-02 20:34:50,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:34:50,463 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:34:50,463 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:34:50,464 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:34:50,466 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:34:50" (1/1) ... [2021-05-02 20:34:50,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:34:50 BasicIcfg [2021-05-02 20:34:50,494 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:34:50,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:34:50,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:34:50,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:34:50,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:34:49" (1/4) ... [2021-05-02 20:34:50,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ca0350c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:34:50, skipping insertion in model container [2021-05-02 20:34:50,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:34:50" (2/4) ... [2021-05-02 20:34:50,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ca0350c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:34:50, skipping insertion in model container [2021-05-02 20:34:50,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:34:50" (3/4) ... [2021-05-02 20:34:50,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ca0350c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:34:50, skipping insertion in model container [2021-05-02 20:34:50,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:34:50" (4/4) ... [2021-05-02 20:34:50,500 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_valuebound10.cJordan [2021-05-02 20:34:50,503 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:34:50,506 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:34:50,517 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:34:50,529 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:34:50,529 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:34:50,529 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:34:50,530 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:34:50,530 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:34:50,530 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:34:50,530 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:34:50,530 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:34:50,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:34:50,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:34:50,543 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:50,544 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:50,544 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:50,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:50,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1042421720, now seen corresponding path program 1 times [2021-05-02 20:34:50,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:50,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338239127] [2021-05-02 20:34:50,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:50,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:34:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:50,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:34:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:50,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:34:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:50,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:34:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:50,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:34:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:34:50,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:50,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338239127] [2021-05-02 20:34:50,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338239127] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:34:50,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:34:50,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:34:50,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399935682] [2021-05-02 20:34:50,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:34:50,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:50,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:34:50,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:34:50,715 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:34:50,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:50,834 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-05-02 20:34:50,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:34:50,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:34:50,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:50,841 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:34:50,841 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:34:50,842 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:34:50,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:34:50,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:34:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:34:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-05-02 20:34:50,868 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 33 [2021-05-02 20:34:50,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:50,868 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-05-02 20:34:50,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:34:50,868 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-05-02 20:34:50,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:34:50,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:50,870 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:50,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:34:50,870 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:50,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:50,871 INFO L82 PathProgramCache]: Analyzing trace with hash 104571547, now seen corresponding path program 1 times [2021-05-02 20:34:50,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:50,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924992013] [2021-05-02 20:34:50,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:50,899 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:50,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101039058] [2021-05-02 20:34:50,899 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 20:34:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:51,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:34:51,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:51,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:51,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:51,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:51,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:51,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:51,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:51,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:51,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:34:51,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:51,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924992013] [2021-05-02 20:34:51,222 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:51,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101039058] [2021-05-02 20:34:51,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101039058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:51,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:51,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:34:51,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452883780] [2021-05-02 20:34:51,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:34:51,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:51,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:34:51,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:34:51,224 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:34:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:34:55,359 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-05-02 20:34:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:34:55,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:34:55,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:34:55,360 INFO L225 Difference]: With dead ends: 46 [2021-05-02 20:34:55,360 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:34:55,361 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:34:55,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:34:55,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 20:34:55,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:34:55,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2021-05-02 20:34:55,366 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 33 [2021-05-02 20:34:55,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:34:55,367 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2021-05-02 20:34:55,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:34:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2021-05-02 20:34:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:34:55,368 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:34:55,368 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:34:55,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:34:55,584 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:34:55,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:34:55,584 INFO L82 PathProgramCache]: Analyzing trace with hash -844389750, now seen corresponding path program 1 times [2021-05-02 20:34:55,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:34:55,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918883965] [2021-05-02 20:34:55,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:34:55,594 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:34:55,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693194407] [2021-05-02 20:34:55,594 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 20:34:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:34:55,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:34:55,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:34:55,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:55,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:55,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:55,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:55,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:55,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:55,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:55,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:55,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:55,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:34:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:34:55,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:34:55,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918883965] [2021-05-02 20:34:55,794 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:34:55,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693194407] [2021-05-02 20:34:55,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693194407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:34:55,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:34:55,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:34:55,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393394136] [2021-05-02 20:34:55,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:34:55,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:34:55,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:34:55,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:34:55,796 INFO L87 Difference]: Start difference. First operand 45 states and 58 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, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:35:06,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:35:06,700 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2021-05-02 20:35:06,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:35:06,701 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, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-05-02 20:35:06,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:35:06,703 INFO L225 Difference]: With dead ends: 61 [2021-05-02 20:35:06,703 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:35:06,703 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:35:06,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:35:06,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-05-02 20:35:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 36 states have internal predecessors, (38), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 20:35:06,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2021-05-02 20:35:06,710 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 39 [2021-05-02 20:35:06,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:35:06,710 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2021-05-02 20:35:06,710 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, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:35:06,710 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2021-05-02 20:35:06,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:35:06,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:35:06,712 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:35:06,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:35:06,928 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:35:06,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:35:06,930 INFO L82 PathProgramCache]: Analyzing trace with hash -2009827732, now seen corresponding path program 1 times [2021-05-02 20:35:06,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:35:06,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319187271] [2021-05-02 20:35:06,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:35:06,948 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:35:06,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673496744] [2021-05-02 20:35:06,948 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 20:35:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:07,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:35:07,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:35:07,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:07,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,189 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 20:35:09,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:35:09,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:35:09,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319187271] [2021-05-02 20:35:09,295 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:35:09,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673496744] [2021-05-02 20:35:09,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673496744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:35:09,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:35:09,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:35:09,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555110556] [2021-05-02 20:35:09,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:35:09,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:35:09,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:35:09,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:35:09,297 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:35:13,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:35:13,407 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2021-05-02 20:35:13,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:35:13,408 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-05-02 20:35:13,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:35:13,409 INFO L225 Difference]: With dead ends: 81 [2021-05-02 20:35:13,409 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 20:35:13,409 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2126.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:35:13,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 20:35:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-05-02 20:35:13,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 47 states have (on average 1.148936170212766) internal successors, (54), 52 states have internal predecessors, (54), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (19), 14 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:35:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2021-05-02 20:35:13,416 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 47 [2021-05-02 20:35:13,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:35:13,419 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2021-05-02 20:35:13,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:35:13,420 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2021-05-02 20:35:13,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:35:13,421 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:35:13,423 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:35:13,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:35:13,642 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:35:13,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:35:13,643 INFO L82 PathProgramCache]: Analyzing trace with hash 2016182430, now seen corresponding path program 2 times [2021-05-02 20:35:13,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:35:13,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758080711] [2021-05-02 20:35:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:35:13,652 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:35:13,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261240902] [2021-05-02 20:35:13,653 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 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 20:35:13,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:35:13,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:35:13,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:35:13,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:35:13,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:13,965 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 20:35:13,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:35:13,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758080711] [2021-05-02 20:35:13,966 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:35:13,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261240902] [2021-05-02 20:35:13,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261240902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:35:13,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:35:13,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:35:13,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47460967] [2021-05-02 20:35:13,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:35:13,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:35:13,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:35:13,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:35:13,967 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 20:35:16,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:35:16,331 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2021-05-02 20:35:16,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:35:16,332 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 54 [2021-05-02 20:35:16,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:35:16,333 INFO L225 Difference]: With dead ends: 102 [2021-05-02 20:35:16,333 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 20:35:16,333 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:35:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 20:35:16,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-05-02 20:35:16,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 68 states have internal predecessors, (70), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (24), 17 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 20:35:16,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-05-02 20:35:16,340 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 54 [2021-05-02 20:35:16,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:35:16,341 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-05-02 20:35:16,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 20:35:16,341 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-05-02 20:35:16,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:35:16,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:35:16,342 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:35:16,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:35:16,557 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:35:16,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:35:16,557 INFO L82 PathProgramCache]: Analyzing trace with hash 921696812, now seen corresponding path program 3 times [2021-05-02 20:35:16,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:35:16,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705091547] [2021-05-02 20:35:16,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:35:16,567 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:35:16,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913126984] [2021-05-02 20:35:16,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:35:16,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:35:16,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:35:16,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:35:16,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:35:16,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:16,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:19,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:19,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:19,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:20,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:20,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:20,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:20,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:20,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:20,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:20,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:20,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:20,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:20,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:20,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 20:35:20,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:35:20,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705091547] [2021-05-02 20:35:20,068 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:35:20,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913126984] [2021-05-02 20:35:20,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913126984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:35:20,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:35:20,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:35:20,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889487966] [2021-05-02 20:35:20,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:35:20,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:35:20,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:35:20,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=130, Unknown=1, NotChecked=0, Total=156 [2021-05-02 20:35:20,070 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:35:37,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:35:37,485 INFO L93 Difference]: Finished difference Result 168 states and 208 transitions. [2021-05-02 20:35:37,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:35:37,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 61 [2021-05-02 20:35:37,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:35:37,486 INFO L225 Difference]: With dead ends: 168 [2021-05-02 20:35:37,486 INFO L226 Difference]: Without dead ends: 168 [2021-05-02 20:35:37,487 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 12224.4ms TimeCoverageRelationStatistics Valid=87, Invalid=415, Unknown=4, NotChecked=0, Total=506 [2021-05-02 20:35:37,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-02 20:35:37,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-05-02 20:35:37,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 121 states have internal predecessors, (127), 41 states have call successors, (41), 17 states have call predecessors, (41), 16 states have return successors, (40), 29 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 20:35:37,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2021-05-02 20:35:37,497 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 61 [2021-05-02 20:35:37,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:35:37,498 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2021-05-02 20:35:37,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:35:37,498 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2021-05-02 20:35:37,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 20:35:37,499 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:35:37,499 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:35:37,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:35:37,702 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:35:37,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:35:37,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1148557238, now seen corresponding path program 1 times [2021-05-02 20:35:37,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:35:37,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059410820] [2021-05-02 20:35:37,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:35:37,709 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:35:37,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088860098] [2021-05-02 20:35:37,709 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 20:35:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:37,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:35:37,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:35:37,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:37,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:37,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:37,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:37,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:37,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:51,169 WARN L205 SmtUtils]: Spent 13.30 s on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2021-05-02 20:35:51,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:51,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:51,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:51,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:54,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:54,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:54,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:54,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:54,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:54,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:35:54,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059410820] [2021-05-02 20:35:54,165 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:35:54,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088860098] [2021-05-02 20:35:54,165 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-02 20:35:54,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:35:54,381 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.DualJunctionDer$DerHelperSbr.solveForSubject(DualJunctionDer.java:367) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$DerHelperSbr.solveForSubject(DualJunctionDer.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.findBestReplacementSbr(DualJunctionDer.java:312) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer$IDerHelper.tryToEliminateSbr(DualJunctionDer.java:328) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:231) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminateOne(DualJunctionDer.java:182) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryExhaustivelyToEliminate(DualJunctionDer.java:149) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionDer.tryToEliminate(DualJunctionDer.java:127) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.constructQuantifiedFormula(TermDomainOperationProvider.java:114) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.modularPostconditionCall(PredicateTransformer.java:178) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:174) 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 20:35:54,383 INFO L168 Benchmark]: Toolchain (without parser) took 64553.13 ms. Allocated memory was 187.7 MB in the beginning and 233.8 MB in the end (delta: 46.1 MB). Free memory was 152.9 MB in the beginning and 145.7 MB in the end (delta: 7.2 MB). Peak memory consumption was 54.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:35:54,384 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 187.7 MB. Free memory is still 169.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:35:54,384 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.34 ms. Allocated memory is still 187.7 MB. Free memory was 152.7 MB in the beginning and 170.4 MB in the end (delta: -17.7 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:35:54,384 INFO L168 Benchmark]: Boogie Preprocessor took 45.00 ms. Allocated memory is still 187.7 MB. Free memory was 170.4 MB in the beginning and 168.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:35:54,384 INFO L168 Benchmark]: RCFGBuilder took 331.76 ms. Allocated memory is still 187.7 MB. Free memory was 168.9 MB in the beginning and 153.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:35:54,384 INFO L168 Benchmark]: IcfgTransformer took 30.57 ms. Allocated memory is still 187.7 MB. Free memory was 153.2 MB in the beginning and 151.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:35:54,384 INFO L168 Benchmark]: TraceAbstraction took 63888.14 ms. Allocated memory was 187.7 MB in the beginning and 233.8 MB in the end (delta: 46.1 MB). Free memory was 151.1 MB in the beginning and 145.7 MB in the end (delta: 5.4 MB). Peak memory consumption was 52.4 MB. Max. memory is 8.0 GB. [2021-05-02 20:35:54,386 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 187.7 MB. Free memory is still 169.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 252.34 ms. Allocated memory is still 187.7 MB. Free memory was 152.7 MB in the beginning and 170.4 MB in the end (delta: -17.7 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.00 ms. Allocated memory is still 187.7 MB. Free memory was 170.4 MB in the beginning and 168.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 331.76 ms. Allocated memory is still 187.7 MB. Free memory was 168.9 MB in the beginning and 153.2 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 30.57 ms. Allocated memory is still 187.7 MB. Free memory was 153.2 MB in the beginning and 151.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 63888.14 ms. Allocated memory was 187.7 MB in the beginning and 233.8 MB in the end (delta: 46.1 MB). Free memory was 151.1 MB in the beginning and 145.7 MB in the end (delta: 5.4 MB). Peak memory consumption was 52.4 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...