/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/hard-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:52:32,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:52:32,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:52:32,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:52:32,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:52:32,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:52:32,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:52:32,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:52:32,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:52:32,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:52:32,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:52:32,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:52:32,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:52:32,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:52:32,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:52:32,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:52:32,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:52:32,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:52:32,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:52:32,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:52:32,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:52:32,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:52:32,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:52:32,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:52:32,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:52:32,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:52:32,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:52:32,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:52:32,486 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:52:32,499 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:52:32,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:52:32,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:52:32,501 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:52:32,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:52:32,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:52:32,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:52:32,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:52:32,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:52:32,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:52:32,503 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:52:32,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:52:32,503 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:52:32,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:52:32,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:52:32,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:52:32,503 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:52:32,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:52:32,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:52:32,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:52:32,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:52:32,505 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:52:32,505 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:52:32,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:52:32,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:52:32,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:52:32,749 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:52:32,750 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:52:32,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound2.c [2021-05-02 20:52:32,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b90267c53/783cea3e1d5f426d9c5e1e11823de9d7/FLAGcddcbf3ef [2021-05-02 20:52:33,185 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:52:33,185 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound2.c [2021-05-02 20:52:33,190 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b90267c53/783cea3e1d5f426d9c5e1e11823de9d7/FLAGcddcbf3ef [2021-05-02 20:52:33,203 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b90267c53/783cea3e1d5f426d9c5e1e11823de9d7 [2021-05-02 20:52:33,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:52:33,206 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:52:33,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:52:33,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:52:33,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:52:33,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74108724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33, skipping insertion in model container [2021-05-02 20:52:33,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:52:33,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:52:33,348 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/hard-ll_unwindbound2.c[546,559] [2021-05-02 20:52:33,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:52:33,370 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:52:33,387 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/hard-ll_unwindbound2.c[546,559] [2021-05-02 20:52:33,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:52:33,417 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:52:33,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33 WrapperNode [2021-05-02 20:52:33,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:52:33,419 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:52:33,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:52:33,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:52:33,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:52:33,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:52:33,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:52:33,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:52:33,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33" (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 20:52:33,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:52:33,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:52:33,535 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:52:33,535 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:52:33,535 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:52:33,535 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:52:33,535 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:52:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:52:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:52:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:52:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:52:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:52:33,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:52:33,537 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:52:33,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:52:33,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:52:33,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:52:33,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:52:33,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:52:33,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:52:33,717 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:52:33,717 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:52:33,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:33 BoogieIcfgContainer [2021-05-02 20:52:33,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:52:33,719 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:52:33,719 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:52:33,719 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:52:33,721 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:33" (1/1) ... [2021-05-02 20:52:33,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:52:33 BasicIcfg [2021-05-02 20:52:33,733 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:52:33,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:52:33,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:52:33,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:52:33,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:52:33" (1/4) ... [2021-05-02 20:52:33,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c206642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:52:33, skipping insertion in model container [2021-05-02 20:52:33,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:33" (2/4) ... [2021-05-02 20:52:33,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c206642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:52:33, skipping insertion in model container [2021-05-02 20:52:33,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:33" (3/4) ... [2021-05-02 20:52:33,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c206642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:52:33, skipping insertion in model container [2021-05-02 20:52:33,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:52:33" (4/4) ... [2021-05-02 20:52:33,737 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound2.cJordan [2021-05-02 20:52:33,754 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:52:33,757 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:52:33,767 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:52:33,780 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:52:33,780 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:52:33,780 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:52:33,780 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:52:33,780 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:52:33,780 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:52:33,781 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:52:33,781 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:52:33,789 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 20:52:33,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:52:33,793 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:33,793 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:33,793 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:33,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:33,796 INFO L82 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2021-05-02 20:52:33,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:33,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875119232] [2021-05-02 20:52:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:33,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:33,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:52:33,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:33,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875119232] [2021-05-02 20:52:33,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875119232] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:33,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:33,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:52:33,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658175229] [2021-05-02 20:52:33,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:52:33,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:33,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:52:33,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:52:33,983 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:52:34,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:34,109 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 20:52:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:52:34,110 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 20:52:34,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:34,114 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:52:34,115 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:52:34,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:52:34,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:52:34,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 20:52:34,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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 20:52:34,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 20:52:34,145 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-02 20:52:34,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:34,145 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 20:52:34,145 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:52:34,145 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 20:52:34,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:52:34,146 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:34,146 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:34,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:52:34,146 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:34,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:34,147 INFO L82 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2021-05-02 20:52:34,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:34,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404529739] [2021-05-02 20:52:34,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:34,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:34,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:34,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:52:34,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:34,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404529739] [2021-05-02 20:52:34,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404529739] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:34,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:34,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:52:34,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961409483] [2021-05-02 20:52:34,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:34,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:34,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:34,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:34,285 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:52:34,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:34,509 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2021-05-02 20:52:34,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:34,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 20:52:34,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:34,512 INFO L225 Difference]: With dead ends: 45 [2021-05-02 20:52:34,512 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 20:52:34,513 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:34,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 20:52:34,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-02 20:52:34,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:52:34,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 20:52:34,528 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-02 20:52:34,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:34,528 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 20:52:34,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 20:52:34,528 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 20:52:34,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 20:52:34,530 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:34,530 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:34,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:52:34,532 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:34,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:34,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2021-05-02 20:52:34,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:34,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384256838] [2021-05-02 20:52:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:34,554 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:34,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367915465] [2021-05-02 20:52:34,554 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 20:52:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:34,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:52:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:34,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:34,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:34,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:34,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:34,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:52:34,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:34,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384256838] [2021-05-02 20:52:34,699 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:34,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367915465] [2021-05-02 20:52:34,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367915465] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:34,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:34,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:52:34,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907567034] [2021-05-02 20:52:34,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:52:34,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:34,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:52:34,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:52:34,701 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:52:34,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:34,711 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-05-02 20:52:34,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:52:34,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 20:52:34,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:34,712 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:52:34,713 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 20:52:34,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:52:34,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 20:52:34,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 20:52:34,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:52:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-02 20:52:34,721 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-02 20:52:34,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:34,721 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-02 20:52:34,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 20:52:34,721 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-02 20:52:34,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:52:34,723 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:34,723 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:34,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 20:52:34,927 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:34,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:34,928 INFO L82 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2021-05-02 20:52:34,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:34,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109666692] [2021-05-02 20:52:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:35,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:35,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:35,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 20:52:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:52:35,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:35,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109666692] [2021-05-02 20:52:35,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109666692] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:35,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:35,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:52:35,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359763478] [2021-05-02 20:52:35,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:35,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:35,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:35,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:35,051 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:52:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:35,273 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-05-02 20:52:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:35,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:52:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:35,275 INFO L225 Difference]: With dead ends: 50 [2021-05-02 20:52:35,275 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 20:52:35,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:35,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 20:52:35,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-02 20:52:35,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:52:35,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 20:52:35,283 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-02 20:52:35,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:35,283 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 20:52:35,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:52:35,283 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 20:52:35,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:52:35,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:35,284 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:35,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 20:52:35,285 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:35,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:35,286 INFO L82 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2021-05-02 20:52:35,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:35,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254644723] [2021-05-02 20:52:35,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:35,303 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:35,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231397992] [2021-05-02 20:52:35,304 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 20:52:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:35,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:52:35,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:52:35,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:35,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254644723] [2021-05-02 20:52:35,455 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:35,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231397992] [2021-05-02 20:52:35,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231397992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:35,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:35,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:52:35,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799587454] [2021-05-02 20:52:35,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:52:35,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:35,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:52:35,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:52:35,456 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:52:35,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:35,575 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-05-02 20:52:35,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:35,576 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-02 20:52:35,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:35,577 INFO L225 Difference]: With dead ends: 61 [2021-05-02 20:52:35,577 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:52:35,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:35,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:52:35,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 20:52:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:52:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2021-05-02 20:52:35,580 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 28 [2021-05-02 20:52:35,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:35,580 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2021-05-02 20:52:35,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:52:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2021-05-02 20:52:35,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:52:35,581 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:35,581 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:35,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:35,796 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:35,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:35,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2021-05-02 20:52:35,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:35,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200320418] [2021-05-02 20:52:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:35,803 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:35,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258901603] [2021-05-02 20:52:35,804 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 20:52:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:35,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:52:35,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:35,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:35,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:35,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200320418] [2021-05-02 20:52:35,946 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:35,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258901603] [2021-05-02 20:52:35,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258901603] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:35,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:35,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:52:35,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273857015] [2021-05-02 20:52:35,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:52:35,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:35,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:52:35,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:52:35,947 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:52:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:35,973 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-02 20:52:35,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:52:35,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 20:52:35,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:35,974 INFO L225 Difference]: With dead ends: 69 [2021-05-02 20:52:35,974 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 20:52:35,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:52:35,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 20:52:35,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-02 20:52:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:52:35,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-02 20:52:35,978 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-02 20:52:35,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:35,978 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-02 20:52:35,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:52:35,978 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-02 20:52:35,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:52:35,978 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:35,979 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:36,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:36,181 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:36,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2021-05-02 20:52:36,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:36,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962691797] [2021-05-02 20:52:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:36,187 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:36,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462805740] [2021-05-02 20:52:36,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:36,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:52:36,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:36,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:36,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:36,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962691797] [2021-05-02 20:52:36,381 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:36,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462805740] [2021-05-02 20:52:36,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462805740] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:36,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:36,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:52:36,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968792286] [2021-05-02 20:52:36,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:52:36,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:36,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:52:36,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:52:36,383 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:52:36,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:36,496 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-05-02 20:52:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:52:36,497 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 20:52:36,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:36,497 INFO L225 Difference]: With dead ends: 72 [2021-05-02 20:52:36,498 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:52:36,498 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:52:36,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:52:36,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 20:52:36,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:52:36,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 20:52:36,501 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-02 20:52:36,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:36,501 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 20:52:36,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:52:36,501 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 20:52:36,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:52:36,502 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:36,502 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:36,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:36,717 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:36,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:36,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2021-05-02 20:52:36,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:36,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537582291] [2021-05-02 20:52:36,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:36,723 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:36,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396153328] [2021-05-02 20:52:36,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:36,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:52:36,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:36,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:36,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:36,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537582291] [2021-05-02 20:52:36,840 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:36,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396153328] [2021-05-02 20:52:36,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396153328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:36,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:36,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:52:36,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237365633] [2021-05-02 20:52:36,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:52:36,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:36,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:52:36,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:52:36,843 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:52:36,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:36,896 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-05-02 20:52:36,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:52:36,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-02 20:52:36,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:36,897 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:52:36,897 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:52:36,897 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:36,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:52:36,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 20:52:36,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:52:36,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-02 20:52:36,900 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-02 20:52:36,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:36,900 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-02 20:52:36,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 20:52:36,900 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-02 20:52:36,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 20:52:36,901 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:36,901 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:37,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:37,108 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:37,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:37,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2021-05-02 20:52:37,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:37,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137485646] [2021-05-02 20:52:37,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:37,114 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:37,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782643552] [2021-05-02 20:52:37,114 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 20:52:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:37,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:52:37,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:37,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:52:37,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:37,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137485646] [2021-05-02 20:52:37,323 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:37,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782643552] [2021-05-02 20:52:37,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782643552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:37,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:37,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:52:37,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893037124] [2021-05-02 20:52:37,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:52:37,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:37,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:52:37,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:52:37,324 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:52:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:37,538 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2021-05-02 20:52:37,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:52:37,539 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2021-05-02 20:52:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:37,539 INFO L225 Difference]: With dead ends: 87 [2021-05-02 20:52:37,539 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 20:52:37,540 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:52:37,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 20:52:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-05-02 20:52:37,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 54 states have internal predecessors, (62), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 20:52:37,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2021-05-02 20:52:37,544 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 46 [2021-05-02 20:52:37,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:37,544 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2021-05-02 20:52:37,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:52:37,544 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2021-05-02 20:52:37,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:52:37,545 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:37,545 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:37,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:37,760 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:37,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2021-05-02 20:52:37,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:37,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022628709] [2021-05-02 20:52:37,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:37,773 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:37,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789250582] [2021-05-02 20:52:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:37,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:52:37,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:37,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,044 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 20:52:38,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:38,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022628709] [2021-05-02 20:52:38,044 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:38,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789250582] [2021-05-02 20:52:38,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789250582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:38,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:38,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:52:38,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115425742] [2021-05-02 20:52:38,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:52:38,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:38,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:52:38,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:38,045 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:52:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:38,295 INFO L93 Difference]: Finished difference Result 110 states and 142 transitions. [2021-05-02 20:52:38,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:52:38,296 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-02 20:52:38,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:38,297 INFO L225 Difference]: With dead ends: 110 [2021-05-02 20:52:38,297 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 20:52:38,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:52:38,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 20:52:38,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 89. [2021-05-02 20:52:38,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 58 states have internal predecessors, (67), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:52:38,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2021-05-02 20:52:38,301 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 54 [2021-05-02 20:52:38,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:38,301 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2021-05-02 20:52:38,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:52:38,301 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2021-05-02 20:52:38,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 20:52:38,302 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:38,302 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:38,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 20:52:38,517 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:38,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:38,517 INFO L82 PathProgramCache]: Analyzing trace with hash 973937241, now seen corresponding path program 1 times [2021-05-02 20:52:38,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:38,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473059346] [2021-05-02 20:52:38,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:38,523 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:38,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158563397] [2021-05-02 20:52:38,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:52:38,568 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:52:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:52:38,583 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:52:38,621 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 20:52:38,621 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 20:52:38,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 20:52:38,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:52:38 BasicIcfg [2021-05-02 20:52:38,865 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:52:38,868 INFO L168 Benchmark]: Toolchain (without parser) took 5659.36 ms. Allocated memory was 200.3 MB in the beginning and 241.2 MB in the end (delta: 40.9 MB). Free memory was 164.7 MB in the beginning and 118.6 MB in the end (delta: 46.1 MB). Peak memory consumption was 87.3 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:38,868 INFO L168 Benchmark]: CDTParser took 0.08 ms. Allocated memory is still 200.3 MB. Free memory is still 181.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:52:38,869 INFO L168 Benchmark]: CACSL2BoogieTranslator took 207.83 ms. Allocated memory is still 200.3 MB. Free memory was 164.5 MB in the beginning and 183.1 MB in the end (delta: -18.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:38,869 INFO L168 Benchmark]: Boogie Preprocessor took 41.12 ms. Allocated memory is still 200.3 MB. Free memory was 183.1 MB in the beginning and 181.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:38,869 INFO L168 Benchmark]: RCFGBuilder took 257.38 ms. Allocated memory is still 200.3 MB. Free memory was 181.7 MB in the beginning and 165.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:38,869 INFO L168 Benchmark]: IcfgTransformer took 13.89 ms. Allocated memory is still 200.3 MB. Free memory was 165.6 MB in the beginning and 164.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:38,869 INFO L168 Benchmark]: TraceAbstraction took 5131.69 ms. Allocated memory was 200.3 MB in the beginning and 241.2 MB in the end (delta: 40.9 MB). Free memory was 163.9 MB in the beginning and 118.6 MB in the end (delta: 45.3 MB). Peak memory consumption was 87.1 MB. Max. memory is 8.0 GB. [2021-05-02 20:52:38,869 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08 ms. Allocated memory is still 200.3 MB. Free memory is still 181.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 207.83 ms. Allocated memory is still 200.3 MB. Free memory was 164.5 MB in the beginning and 183.1 MB in the end (delta: -18.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.12 ms. Allocated memory is still 200.3 MB. Free memory was 183.1 MB in the beginning and 181.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 257.38 ms. Allocated memory is still 200.3 MB. Free memory was 181.7 MB in the beginning and 165.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.89 ms. Allocated memory is still 200.3 MB. Free memory was 165.6 MB in the beginning and 164.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5131.69 ms. Allocated memory was 200.3 MB in the beginning and 241.2 MB in the end (delta: 40.9 MB). Free memory was 163.9 MB in the beginning and 118.6 MB in the end (delta: 45.3 MB). Peak memory consumption was 87.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=13, counter=0] [L24] unsigned int A, B; [L25] long long r, d, p, q; [L26] A = __VERIFIER_nondet_unsigned_int() [L27] B = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(B >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L12] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L28] RET assume_abort_if_not(B >= 1) VAL [\old(counter)=0, B=-4294967295, counter=0] [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [\old(counter)=0, A=1, B=-4294967295, counter=0, d=1, p=1, q=0, r=1] [L35] EXPR counter++ VAL [\old(counter)=0, A=1, B=-4294967295, counter=1, counter++=0, d=1, p=1, q=0, r=1] [L35] COND TRUE counter++<2 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=1, B=-4294967295, counter=1, d=1, p=1, q=0, r=1] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=1, B=-4294967295, counter=1, d=1, p=1, q=0, r=1] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=1, B=-4294967295, counter=1, d=1, p=1, q=0, r=1] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [\old(counter)=0, A=1, B=-4294967295, counter=1, d=2, p=2, q=0, r=1] [L35] EXPR counter++ VAL [\old(counter)=0, A=1, B=-4294967295, counter=2, counter++=1, d=2, p=2, q=0, r=1] [L35] COND TRUE counter++<2 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=1, B=-4294967295, counter=2, d=2, p=2, q=0, r=1] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=1, B=-4294967295, counter=2, d=2, p=2, q=0, r=1] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=1, B=-4294967295, counter=2, d=2, p=2, q=0, r=1] [L39] COND TRUE !(r >= d) VAL [\old(counter)=0, A=1, B=-4294967295, counter=2, d=2, p=2, q=0, r=1] [L45] EXPR counter++ VAL [\old(counter)=0, A=1, B=-4294967295, counter=3, counter++=2, d=2, p=2, q=0, r=1] [L45] COND FALSE !(counter++<2) [L59] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L59] RET __VERIFIER_assert(A == d*q + r) VAL [\old(counter)=0, A=1, B=-4294967295, counter=3, d=2, p=2, q=0, r=1] [L60] CALL __VERIFIER_assert(B == d) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5057.6ms, OverallIterations: 11, TraceHistogramMax: 8, EmptinessCheckTime: 13.7ms, AutomataDifference: 1396.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 397 SDtfs, 210 SDslu, 1230 SDs, 0 SdLazy, 889 SolverSat, 145 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 663.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 302 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 720.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=10, InterpolantAutomatonStates: 73, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 61.5ms AutomataMinimizationTime, 10 MinimizatonAttempts, 36 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 76.5ms SsaConstructionTime, 181.4ms SatisfiabilityAnalysisTime, 1225.3ms InterpolantComputationTime, 376 NumberOfCodeBlocks, 376 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 307 ConstructedInterpolants, 0 QuantifiedInterpolants, 1338 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1047 ConjunctsInSsa, 104 ConjunctsInUnsatCore, 10 InterpolantComputations, 6 PerfectInterpolantSequences, 178/199 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...